PUTNAM TAX FREE INCOME TRUST /MA/
N-30D, 1995-04-11
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Putnam 
Tax-Free 
Insured 
Fund 

SEMIANNUAL REPORT 
January 31, 1995 

(LOGO--Balance Scales) 
BOSTON-LONDON-TOKYO 

<PAGE>
 
Performance highlights 

> "Demand for tax-free income and lack of new issuance in many states is 
  helping to drive (municipal bond) prices higher." 
  -- Bloomberg, February 1, 1995 

> Performance should always be considered in light of a fund's investment 
  strategy. Putnam Tax-Free Insured Fund is for investors seeking high 
  current income free from federal income tax through investments primarily 
  in insured investment-grade tax-exempt securities. 

SEMIANNUAL RESULTS AT A GLANCE 
<TABLE>
<CAPTION>
                                              Class A                        Class B 
<S>                        <C>         <C>             <C>            <C>            <C>
Total return:                            NAV            POP           NAV            CDSC 
...................................................................................................... 
(change in value during 
  period plus reinvested 
  distributions) 
  6 months ended 1/31/95                 0.64 %       -4.13%          0.32%          -4.56 % 
                                                        Class A               Class B 
Share value:                                  NAV           POP                       NAV 
...................................................................................................... 
7/31/94                                $14.67             $15.40                    $14.68 
1/31/95                                 14.33              15.04                     14.34 

                                                        Capital gains(1) 
Distributions:                                                Short- 
                              No.        Income                term                  Total 
...................................................................................................... 
Class A                       7         $0.417890             $0.005                $0.422890 
Class B                       7          0.372578              0.005                 0.377578 
Current return:                         NAV           POP                            NAV 
...................................................................................................... 
End of period 
Current dividend rate(2)                 5.67%       5.41%                           5.05% 
Taxable equivalent(3)                    9.39        8.96                            8.36 
Current 30-day SEC yield(4)              5.68        5.40                            5.03 
Taxable equivalent(3)                    9.40        8.94                            8.33 
</TABLE>
Performance data represent past results and will differ for each share class. 
For performance over longer periods, see page 8. POP assumes 4.75% maximum 
sales charge for class A shares. CDSC for class B shares assumes 5% maximum 
contingent deferred sales charge. (1)Capital gains are taxable for federal 
and, in most cases, state tax purposes. For some investors, investment income 
may also be subject to the federal alternative minimum tax. Investment income 
may be subject to state and local taxes. (2)Income portion of most recent 
distribution, annualized and divided by NAV or POP at end of period. 
(3)Assumes maximum 39.6% federal tax rate. Results for investors subject to 
lower tax rates would not be as advantageous. (4)Based only on investment 
income, calculated using SEC guidelines. The yield and value of Fund shares 
is neither insured nor guaranteed and will fluctuate. 
<PAGE>
 
From the Chairman 

(Photo-George Putnam) 
(c) Karsh, Ottawa 

Dear Shareholder: 

Putnam Tax-Free Insured Fund reached the midpoint of fiscal 1995 as the 
Federal Reserve Board pushed short- term interest rates to their highest 
level in four years. The Fed's sustained strategy for keeping inflation in 
check by tightening credit has made investors understandably nervous. For 
more than a year, their jitters have translated into an extremely unsettled 
municipal bond market. 

The market is likely to remain volatile for a while. Nevertheless, Fund 
Manager Richard Wyke believes your fund is well positioned to benefit from a 
market that may hold great opportunity in 1995. Evidence of rising investor 
demand for tax-free securities is beginning to appear, even as the flow of 
new issues to market remains well below 1993's record levels. Although there 
can never be any assurances, Rick believes this combination could translate 
into higher bond prices in coming months. 

Because he expects market volatility to persist over the next few months, 
Rick continues to position the fund's portfolio somewhat defensively. He 
advises shareholders, however, that having a defensive posture does not 
preclude investing in promising areas of the municipal bond market. In the 
report that follows, Rick reviews fiscal '95 progress to date and reveals 
what he and his management team see ahead. 

Respectfully yours, 

(Signature-George Putnam) 
George Putnam 
Chairman of the Trustees 
March 15, 1995 

<PAGE>
 
Report from the fund manager 
Richard P. Wyke 

Putnam Tax-Free Insured Fund began calendar 1995 as most fixed-income 
investors were still nursing the financial wounds they sustained during 
calendar 1994. During the first half of fiscal 1995, rising short-term 
interest rates and growing inflationary expectations combined to attack the 
total returns of most bond funds. Thus, while we became more optimistic about 
the bond market's prospects for 1995, the fund's performance -- like that of 
most bond funds -- was disappointing. 

However, investors can take heart in the fact that the fund generated an 
attractive level of current income in the period ended January 31, 1995. The 
fund's class B shares produced a current dividend rate of 5.05%. For 
investors in the 39.6% tax bracket this would be equivalent to a taxable 
yield of 8.36%. Of course, results for investors in lower brackets would not 
be as advantageous. Class A shares yielded 5.67%. 

Despite a challenging year for the municipal bond market, we are confident 
the fund is well positioned for the future, and want to show you why we 
believe the market offers rewarding possibilities for tax-conscious investors 
in 1995. 

> 1994 -- AN OVERVIEW 

During 1994, many investors asked us "What happened?" First and foremost, the 
Federal Reserve Board raised short-term interest rates six times. While the 
Fed's efforts were intended to head off inflation, which erodes the value of 
fixed-income investments, investors believed the Fed was not doing enough. 
Furthermore, since the prices of existing bonds fall and their yields rise 
when interest rates increase, continually declining bond prices, accompanied 
by substantial market volatility, dominated the fixed-income market for most 
of the year. 

Interest-rate upturns were not the only hurdles facing the municipal bond 
market last year. By early October, when relative calm returned to the 
market, tax-loss selling in the municipal bond mar 
<PAGE>
ket added another blow to bond performance. These fiscal-year-end adjustments 
that money managers and individuals made to their portfolios for tax purposes 
depressed prices further. This sell off created yet another disruption in an 
already-battered municipal bond market. 

In early December, as municipals were enjoying a short rally, the financial 
woes of Orange County, California, shook the market. The immediate drop in 
value of county-related bonds was only the beginning of the fallout from the 
$2 billion in losses sustained by the county's investment fund. As the major 
rating agencies downgraded Orange County bonds almost overnight, investors 
across the country began questioning the safety of municipal bonds. 

> PROACTIVE MANAGEMENT MAXIMIZES TOTAL RETURN POTENTIAL 

In our daily management of the fund, we continually search for municipal 
bonds that offer the right balance of credit quality, yield, and relative 
price stability. To do so, we constantly reevaluate the portfolio's current 
holdings. Under the right circumstances, we may sell one security while 
simultaneously buying another in order to take advantage of differences in 
such factors as coupon rates, maturities, and marketability -- a strategy 
known as bond swapping. 

(Bar Chart) 
TOP FIVE STATE CONCENTRATIONS* 
California    11.1% 
Florida        9.6% 
New York       8.6% 
Pennsylvania   7.2% 
Texas          7.1% 
As a percentage of net assets as of 1/31/95 
Holdings will vary over time. 

<PAGE>
Last fall, we sold bonds priced at par, or face value. At the same time, we 
purchased bonds we believed offered greater price- appreciation potential. 
Although newer holdings may experience greater price fluctuation over the 
near term, we believe they also have the potential to make a noticeable 
impact on the fund's overall total return, should the market rally. 

While we are continually positioning the portfolio for the long term, we are 
not discounting the likelihood of ongoing short-term volatility. Therefore, 
we have maintained the portfolio's call protection by purchasing bonds that 
cannot be called or paid off for several years. Additional defensive measures 
also include maintaining a relatively short duration (a measure of 
volatility) and sustaining a higher-than-average coupon structure -- as 
evidenced by the fund's high income stream. 

> POSITIVE OUTLOOK FOR CALENDAR 1995 

Although Putnam Management expects further volatility in the bond market for 
at least the first half of the new year, 1995 is off to an encouraging start. 
The municipal bond market enjoyed an extended January rally, which translated 
into a 3.22% total return at net asset value for class A shares for the 
month. Recently, there is some evidence of positive changes in the municipal 
market as seen in yields of existing tax-exempt debt (see chart on page 7). 
Because of the inverse relationship of yields to bond prices, when yields 
decline, prices will rise. 

We also see signs of optimism in the broader markets. Specifically, the 
flattening of the U.S. Treasury yield curve suggests that investors believe 
the Fed's inflation-fighting measures will satisfactorily slow economic 
expansion. It also appears likely that the supply/ demand imbalance detailed 
in the fund's annual report has started to develop. The $6 billion in 
municipal bonds issued in January is the lowest monthly new-issue figure 
recorded since 1988. Not surprisingly, as noted in Bloomberg (February 1, 
1995), market 
<PAGE>
 
(Line Chart)
MUNICIPAL BOND YIELDS IN DECLINE
Bond prices rise as bond yields decline. 
        7.44    
        7.92    
        7.92    
        8.04    
        7.6     
        7.28    
        7.44    
        7.32    
        7.28    
        7.18    
        6.96    
        7.08    
        6.86    
11/1/94  12/1/94  1/1/94  2/1/95

Evidence of positive changes in the municipal bond market can be seen in the 
falling yields of existing tax-exempt debt. (Bond yields move in the opposite 
direction from their prices.) The Bond Buyer Municipal Bond Index is a list 
of 40 unmanaged individual municipal bonds. It is not intended to represent 
the fund's performance. Source: Bloomberg; data plotted weekly. 

analysts are reporting heightened demand for quality issues. Since your 
fund's portfolio consists primarily of AAA-rated insured securities, we 
expect this trend, if it continues, to affect the value of fund holdings 
relatively favorably. Of course, there can be no guarantee of this result. 

Despite a difficult calendar 1994, Putnam Management is optimistic about 
1995. We will, of course, continue to monitor any political or economic 
events that could impact your fund's portfolio. We also believe that as time 
goes on, municipal bonds will become more attractive to tax-conscious 
investors when compared to taxable alternatives. 

Bond insurance does not guarantee principal or protect against changes in 
market price. The views expressed here are exclusively those of Putnam 
Management. They are not meant as investment advice. Although the described 
holdings were viewed favorably as of January 31, 1995, there is no guarantee 
the fund will continue to hold these securities in the future. Consult your 
tax advisor for more guidance. 

<PAGE>
 
Performance summary 

This section provides, at a glance, information about your fund's 
performance. Total return shows how the value of the fund's shares changed 
over time, assuming you held the shares through the entire period and 
reinvested all distributions in the fund. We show total return in two ways: 
on a cumulative long-term basis, and on average how the fund might have grown 
each year over varying periods. For comparative purposes, we show how the 
fund performed relative to appropriate indexes and benchmarks. 

TOTAL RETURN FOR PERIODS ENDED 1/31/95 

<TABLE>
<CAPTION>
                           Class A                 Class B 
                                                                      Lehman Bros. 
                                                                     Municipal Bond 
                       NAV        POP         NAV         CDSC           Index           CPI 
<S>                   <C>         <C>        <C>         <C>            <C>              <C>
6 months               0.64%      -4.13%       0.32 %     -4.56 %         0.25 %          1.28% 
1 year                -3.86       -8.44       -4.47       -9.00          -3.56            2.80 
5 years                 --          --        36.09       34.09          44.07           17.98 
Annual average          --          --         6.36        6.04           7.58            3.36 
Life of class A       -1.86       -6.51         --          --           -1.09            3.58 
Annual average        -1.37       -4.83         --          --           -0.80            2.62 
Life of class B         --          --       106.37      106.37         126.78           39.17 
Annual average          --          --         8.02        8.02           9.11            3.58 
</TABLE>
TOTAL RETURN FOR PERIODS ENDED 12/31/94 
(most recent calendar quarter) 

<TABLE>
<CAPTION>
                                  Class A                       Class B 
<S>                        <C>           <C>            <C>           <C>
                              NAV           POP            NAV           CDSC 
1 year                       -5.78%       -10.25%         -6.38%        -10.82% 
5 years                       --            --            30.43          28.48 
Annual average                --            --             5.46           5.14 
Life of class A              -4.92         -9.43           --            -- 
Annual average               -3.87         -7.44           --            -- 
Life of class B               --            --           100.04         100.04 
Annual average                --            --             7.73           7.73 
</TABLE>
Fund performance data do not take into account any adjustment for taxes 
payable on reinvested distributions. The fund began investment operations on 
9/9/85, offering shares now known as class B. Class A shares were offered as 
of 9/20/93. Performance data represent past results and will differ for each 
share class. Investment returns and principal value will fluctuate so an 
investor's shares, when sold, may be worth more or less than their original 
cost. 
<PAGE>
TERMS AND DEFINITIONS 

Class A shares are generally subject to an initial sales charge. 

Class B shares may be subject to a sales charge upon redemption. 

Net asset value (NAV) is the value of all your fund's assets, minus any 
liabilities, divided by the number of outstanding shares, not including any 
initial or contingent deferred sales charge. 

Public Offering Price (POP) is the price of a mutual fund share plus the 
maximum sales charge levied at the time of purchase. POP performance figures 
shown here assume the maximum 4.75% sales charge for Tax-free Funds. 

Contingent deferred sales charge (CDSC) is a charge applied at the time of 
the redemption of class B shares and assumes redemption at the end of the 
period. Your fund's CDSC declines from a 5% maximum during the first year to 
1% during the sixth year. After the sixth year, the CDSC no longer applies. 

COMPARATIVE BENCHMARKS 

Lehman Brothers Municipal Bond Index is an unmanaged list of long-term 
fixed-rate investment-grade tax-exempt bonds representative of the municipal 
bond market. The index does not take into account brokerage commissions or 
other costs, may include bonds different from those in the fund, and may pose 
different risks than the fund. 

Consumer Price Index (CPI) is a commonly used measure of inflation; it does 
not represent an investment return. 
<PAGE>
The Putnam Fund Selector(tm) 

The Putnam Fund Selector shows the many opportunities 
for investors within every investment strategy. All investors 
should first accumulate a base of conservative, cash-equivalent investments. 
Then, with the help of your investment advisor, 
diversify your portfolio by investing in the Putnam Family 
of Funds. 

(Graphic)
Pyramid showing risk/reward

PUTNAM GROWTH FUNDS
PUTNAM GROWTH AND INCOME FUNDS
PUTNAM INCOME OR TAX-FREE FUNDS
MOST CONSERVATIVE INVESTMENTS
<PAGE>
Putnam Family of Funds 

PUTNAM GROWTH FUNDS 
Asia Pacific Growth Fund 
Capital Appreciation Fund 
Diversified Equity Trust 
Europe Growth Fund 
Global Growth Fund 
Health Sciences Trust 
Investors Fund 
Natural Resources Fund* 
New Opportunities Fund 
OTC Emerging Growth Fund 
Overseas Growth Fund 
Vista Fund 
Voyager Fund 

PUTNAM GROWTH AND 
INCOME FUNDS 
Convertible Income-Growth Trust 
Dividend Growth Fund 
Equity Income Fund 
The George Putnam Fund of Boston 
The Putnam Fund for Growth and Income 
Managed Income Trust 
Utilities Growth and Income Fund 

PUTNAM INCOME FUNDS 
Adjustable Rate U.S. Government Fund 
American Government Income Fund 
Balanced Government Fund 
Corporate Asset Trust 
Diversified Income Trust 
Federal Income Trust 
Global Governmental Income Trust 
High Yield Advantage Fund 
High Yield Trust 
Income Fund 
U.S. Government Income Trust 

Please call your financial advisor or Putnam to 
obtain a prospectus for any Putnam fund. It contains more complete 
information, including charges and expenses. Read it carefully before you 
invest or send money. 

PUTNAM TAX-FREE 
INCOME FUNDS 
Intermediate Tax Exempt Fund 
Municipal Income Fund 
Tax Exempt Income Fund 
Tax-Free High Yield Fund 
Tax-Free Insured Fund 
State tax-free income funds+ 

Arizona, California, Florida, Massachusetts, Michigan, Minnesota, New Jersey, 
New York, Ohio, and 
Pennsylvania 

LIFESTAGE(SM) FUNDS 
Putnam Asset Allocation Funds -- three investment portfolios that spread your 
money across a variety of stocks, bonds, and money market investments to help 
maximize your return and reduce your risk. 
The three portfolios: 
Putnam Asset Allocation: Balanced Portfolio 
Putnam Asset Allocation: Conservative Portfolio 
Putnam Asset Allocation: Growth Portfolio 

MOST CONSERVATIVE 
INVESTMENTS++ 
Putnam money market funds: 
Money Market Fund'SS'. 
California Tax Exempt Money Market Fund 
New York Tax Exempt Money Market Fund 
Tax Exempt Money Market Fund 
CDs and savings accounts** 
*Formerly Energy-Resources Trust. 
+Not available in all states. 
++Relative to above. 
'SS'Formerly Daily Dividend Trust. 
**Not offered by Putnam Investments. Certificates of deposit offer a fixed rate 
of return and may be insured, up to certain limits, by federal/state 
agencies. Savings accounts may also be insured up to certain limits. 
<PAGE>
Portfolio of investments owned 
January 31, 1995 (unaudited) 

MUNICIPAL BONDS AND NOTES (97.6%)* 
PRINCIPAL AMOUNT RATINGS**
PRINCIPAL AMOUNT
<TABLE>
<CAPTION>
                                                                                RATINGS**          VALUE
<S>             <C>                                                                <C>         <C>
 Alaska (0.1%) 
   $425,000     AK Hsg. Fin. Corp. Home Mtge. Rev. Bonds Ser. A, Government 
                National Mortgage Assn. (GNMA), Coll., 8-3/8s, 12/1/16              AAA         $   439,875 
Arizona (1.3%) 
                AZ Muni. Fin. Program Certif. of Participation (COP) Bond 
                Investors Guaranty Insurance Co. (BIGI), 
  1,000,000      Ser. 31, 7-1/4s, 8/1/09                                            AAA           1,096,250 
  5,700,000      Ser. 34, 7-1/4s, 8/1/09                                            AAA           6,248,625
                                                                                                ----------- 
                                                                                                  7,344,875 
California (11.1%) 
  3,850,000     CA Hlth. Fac. Fin. Auth. Insd. Rev. Bonds (Catholic), Ser. B, 
                American Municipal Bond Assurance Corp. (AMBAC), 5s, 7/1/21         AAA           3,104,063 
  8,000,000     CA State General Obligation (G.O.) Bonds Financial Security 
                Assurance (FSA), 5-1/2s, 3/1/20                                     AAA           6,950,000 
  3,110,000     CA State Pub. Works Board Lease Rev. Bonds Floating Rate 
                Stepped-Coupon (5.35s, 1/25/04), (Motion-Picture & TV), AMBAC, 
                5s, 12/1/19                                                         AAA           2,530,763 
  3,000,000     CA Statewide Cmntys. Dev. Auth. Step-Up Recovery Floater COP 
                (Motion Picture & TV), AMBAC, 5.35s, 1/1/24 #                       AAA           2,872,500 
  3,250,000     LA Cnty., Convention and Exhibition Ctr. Auth. Lease Rev. 
                Bonds Ser. A, MBIA Ser. A, 5-3/8s, 8/15/18                          AAA           2,835,625 
  2,500,000     LA Cnty., Trans. Comm. Sales Tax Rev. Bonds Ser. A, 
                Financial Guaranty Insurance Corp. (FGIC), (Proposition C), 
                MBIA                                                                AAA           2,709,375 
  4,000,000      6-3/4s, 7/1/19                                                     AAA           4,355,000 
  3,455,000      6-1/2s, 7/1/20                                                     AAA           3,709,806 
  2,500,000     LA Cnty., Waste Wtr. Syst. Rev. Bonds Ser. D, FGIC, 6s, 
                11/1/14                                                             AAA           2,400,000 
 10,000,000     LA Dept. Wtr. & Pwr. Elec. Plant Rev. Bonds MBIA, 5-1/4s, 
                11/15/26                                                            AAA           8,337,500 
  5,000,000     Sacramento, Muni. Util. Dist. Elec. Rev. Rfdg. Bonds Ser. Y, 
                MBIA, 6-3/4s, 9/1/19                                                AAA           5,425,000 
  5,000,000     San Diego Regional Bldg. Auth. Lease Rev. Bonds 6.9s, 5/1/23        AAA           4,712,500 
  3,680,000     Santa Anna, Fing. Auth. Lease Rev. Bonds (Police Admin. & 
                Hldg. Fac.) Ser. A, MBIA, 6-1/4s, 7/1/17                            AAA           3,634,000 
  6,300,000     U. of CA, Rev. Bonds (Multi-Purpose Projects), Ser. A, MBIA, 
                6-7/8s, 9/1/16                                                      AAA           6,914,250 
                                                                                                ----------- 
                                                                                                 60,490,382 
Colorado (2.6%) 
  4,225,000     CO Hlth. Fac. Auth. Rev. Bonds (Cmnty. Provider Pooled Loan 
                Program), Ser. A, Capital Guarantee Insurance Co. (CGIC), 
                7-1/4s, 7/15/17                                                     AAA           4,446,813 
  3,750,000     CO River Texas Muni. Wtr. Dist. Rev. Bonds AMBAC 5.15s, 1/1/21      AAA           3,103,125 
  6,225,000     El Paso Cnty., Home Mtge. Rev. Bonds Ser. A, GNMA Coll., 8s, 
                3/1/21                                                              AAA           6,489,563 
                                                                                                ----------- 
                                                                                                 14,039,501 

<PAGE>
 
Delaware (1.0%) 
 $5,000,000     DE Econ. Dev. Auth. Poll. Rfdg. Rev. Bonds (Delmarva Pwr.), 
                Ser. B, FGIC, 7.15s, 7/1/18                                         AAA         $ 5,318,750 
Florida (9.6%) 
    900,000     Dade Cnty., Hlth. Fac. Auth. Hosp. Rev. Bonds (North Shore 
                Med. Ctr. Project), AMBAC, 9-1/8s, 10/1/13                          AAA             942,750 
 13,675,000     Hernando Cnty., Rev. Bonds (Criminal Justice Complex), FGIC, 
                7.65s, 7/1/16                                                       AAA          16,085,219 
  5,500,000     Orange Cnty., Hlth. Fac. Auth. Inverse Floating Bonds, 
                Ser. 91-C, MBIA, 7.905s, 10/29/21                                   AAA           5,555,000 
                Orange Cnty., Hlth. Fac. Rev. Bonds (Pooled Hosp. Loan 
                Project), S 
    150,000      Ser. A, FGIC, 7-7/8s, 12/1/25                                      AAA             158,625 
 10,870,000      Ser. B, BIGI 7-7/8s, 12/1/25                                       AAA          11,495,025 
  5,000,000     Orlando & Orange Cnty. Expressway Auth. Rev. Bonds FGIC, 
                8-1/4s, 7/1/14                                                      AAA           6,150,000 
 16,495,000     Plantation, Wtr. & Swr. Auth. Rev. Bonds zero %, MBIA, 3/1/07       AAA           8,000,075 
  4,000,000     Sumter Cnty., School Dist. Rev. Bonds (Multi Dist. Loan 
                Program), CGIC, 7.15s, 11/1/15                                      AAA           4,430,000 
                                                                                                ----------- 
                                                                                                 52,816,694 
Georgia (3.2%) 
                GA Muni. Elec. Auth. Pwr. Rev. Bonds, 
  7,500,000      Ser. B, AMBAC, 6-1/4s, 1/1/12                                      AAA           7,425,000 
 10,000,000      Ser. B, BIGI, zero %, 1/1/08                                       AAA           4,537,500 
  5,500,000     GA Muni. Elec. Special Obligation Rev. Bonds 
                (Project One), AMBAC, 6.4s, 1/1/13                                  AAA           5,527,500 
                                                                                                ----------- 
                                                                                                 17,490,000 
Idaho (0.1%) 
    500,000     ID Hlth. Fac. Auth. Rev. Bonds 
                (Kootenai Med. Ctr. Project), MBIA, 9-1/8s, 8/1/15                  AAA             520,625 
Illinois (4.0%) 
    950,000     Aurora, Hosp. Fac. Rev. Bonds (Mercy Ctr. Hlth. Care Svcs.), 
                Ser. A, AMBAC 9-5/8s, 10/1/09                                       AAA             999,875 
  2,600,000     Chicago, Central Pub. Library Rev. Bonds Ser. B, 
                AMBAC, 6.85s, 1/1/17                                                AAA           2,821,000 
  6,780,000     Chicago, Pub. Bldg. Rev. Bonds (Cmnty. Bldg.), Ser. A, MBIA, 
                7s, 1/1/20                                                          AAA           7,237,650 
  5,000,000     Chicago, Res. Mtge. Rev. Bonds Ser. B., MBIA, zero %, 
                10/1/09                                                             AAA           1,750,000 
  2,000,000     Chicago, School Fin. Auth. Rev. Bonds FGIC, 8-3/4s, 6/1/09          AAA           2,067,500 
  5,000,000     Metro. Pier & Exposition Auth. Tax Rev. Bonds Ser. A, FGIC, 
                zero %, 6/15/17                                                     AAA           1,150,000 
  5,000,000     Regional Trans. Auth. Bonds Ser. A, AMBAC, 8s, 6/1/17               AAA           6,018,750 
                                                                                                ----------- 
                                                                                                 22,044,775 
Indiana (2.6%) 
  7,500,000     IN Hlth. Fac. Fin. Auth. Hosp. Rev. Bonds (Columbus Regl. 
                Hosp.), CGIC, 7s, 8/15/15                                           AAA           7,893,750 
  5,000,000     Marion Cnty., Hosp. Auth. Fac. Rev. Bonds (Cmnty. Hosp. 
                Proj.), MBIA, 9s, 5/1/08                                            AAA           5,150,000 

<PAGE>
 
Indiana (continued) 
 $1,000,000     Vigo Cnty., Hosp. Auth. Rev. Bonds (Union Hosp.), 
                AMBAC, 9.3s, 5/1/11                                                 AAA         $ 1,031,875 
                                                                                                ----------- 
                                                                                                 14,075,625 
Kentucky (0.1%) 
    425,000     KY Hsg. Corp. Multi-Fam. Mtge. Rev. Bonds Ser. A, BIGI, 
                8-7/8s, 7/1/19                                                      AAA             433,500 
Louisiana (1.3%) 
  3,120,500     East Baton Rouge, Mtge. Fin. Auth. Single-Fam. Mtge. Bonds 
                Ser. B, GNMA Coll., 8-1/4s, 2/25/11                                 AAA           3,241,421 
                LA Hsg. Fin. Agcy. Single Fam. Mtge. Rev. Bonds 
    510,000      Ser. 85A, FGIC, 9-3/8s, 2/1/15                                     AAA             528,488 
  1,310,000      GNMA Coll., 9-1/8s, 11/1/18                                        AAA           1,365,675 
  1,700,000     New Orleans, Intl. Arpt. Rev. Bonds MBIA, 9s, 8/1/15                AAA           1,785,000 
                                                                                                ----------- 
                                                                                                  6,920,584 
Massachusetts (4.8%) 
                MA Hlth. & Edl. Fac. Auth. Rev. Bonds 
  2,000,000      (Metro. West Hlth. Inc.), Ser C, AMBAC 6.4s, 11/15/11              AAA           2,022,500 
  5,000,000      (Baystate Med. Ctr.), Ser. D, FGIC, 6s, 7/1/15                     AAA           4,718,750 
    995,000     MA Hsg. Fin. Agcy. Multi-Fam. Hsg. Rev. Bonds Ser. A, 
                MBIA, 8-7/8s, 7/1/18                                                AAA           1,024,850 
  5,200,000     MA Hsg. Fin. Agcy. Rev. Bonds (Hsg. Projects), Ser. A, 
                AMBAC, 5.95s, 10/1/08                                               AAA           5,083,000 
                MA Mun. Whsl. Elec. Co. Pwr. Sply. Svs. Rev. Bonds 
  9,500,000      Ser. E, MBIA, 6s, 7/1/11                                           AAA           8,989,375 
  5,000,000      Ser. A, AMBAC, 5s, 7/1/17                                          AAA           4,175,000 
                                                                                                ----------- 
                                                                                                 26,013,475 
Michigan (3.8%) 
    800,000     Kent Cnty., Hosp. Fin. Auth. Fac. Rev. Bonds (Pine Rest 
                Christian Hosp. Assn.), FGIC, 9s, 11/1/10                           AAA             841,000 
                MI State Hsg. Dev. Auth. Multi-Fam. Rev. Bonds, Ser. A, FGIC 
    800,000      8-7/8s, 7/1/17                                                     AAA             827,000 
  3,000,000      8-3/8s, 7/1/19                                                     AAA           3,120,000 
  4,500,000     MI Strategic Fund Ltd. Oblig. Rev. Bonds (Consumers Pwr. Co. 
                Project), Capital Market Assurance Corp. 
                (CMAC), 5.8s, 6/15/10                                               AAA           4,286,250 
                MI Strategic Fund Ltd. Oblig. Rev. Bonds (Detroit Edison 
                Project Co. Project), 
  4,000,000      Ser. BB, AMBAC, 7s, 5/1/21                                         AAA           4,280,000 
  2,750,000      Ser. AA, FGIC, 6.95s, 5/1/11                                       AAA           2,945,938 
  4,735,000     MI Trunk Line Rev. Bonds AMBAC, zero %, Ser. A, 10/1/11             AAA           1,675,006 
  3,500,000     West Bloomfield, School Dist. Rev Bonds MBIA, 5-1/8s, 5/1/14        AAA           2,996,875 
                                                                                                ----------- 
                                                                                                 20,972,069 
Missouri (0.6%) 
  4,000,000     Missouri Hlth. & Ed. Fac. Auth. Rev. Bonds (St. Luke's Health 
                Syst.), MBIA, 5.1s, 11/15/13                                        AAA           3,450,000 

<PAGE>
 
Montana (0.1%) 
   $500,000     Missoula, Hosp. Fac. Rev. Bonds (Sisters of Charity-St. 
                Patrick), AMBAC, 9.4s, 9/1/12                                       AAA         $   523,125 
Nebraska (1.8%) 
    900,000     NE Investment Fin. Auth. Single Fam. Mtge. GNMA. Coll., IFB, 
                Ser. B, 10.543s, 3/15/22                                            AAA            975,375 
  5,820,000     NE Investments Fin. Auth. Single Fam. Mtg. Rev. Bonds, Ser. 1, 
                MBIA, 8-1/8s, 8/15/38                                               AAA          6,038,250 
  3,000,000     NE Investment Fin. Auth. Hosp. Rev. IFB MBIA, 8-5/8s, 11/15/16      AAA           3,090,000 
                                                                                                ----------- 
                                                                                                 10,103,625 
Nevada (0.9%) 
  4,500,000     Clark Cnty., School Dist. General Obligation (GO) Bonds Ser. 
                A, MBIA, 7s, 6/1/10                                                 AAA           4,826,250 
New Hampshire (0.5%) 
  2,500,000     NH State Tpk. Syst. IFB FGIC, 10.245s, 11/1/17                      AAA           2,656,250 
New Jersey (5.9%) 
  3,000,000     Middlesex Cnty., Utils. Auth. Swr. IFB Ser. A, MBIA, 7.95s, 
                8/15/10                                                             AAA           2,996,250 
  5,925,000     NJ Econ. Dev. Auth. Mkt. Transition Fac. Rev. Bonds Sr.-Lien, 
                Ser A, MBIA, 5-7/8s, 7/1/11                                         AAA           5,754,656 
  6,000,000     NJ Econ. Dev. Auth. Wtr. Facs. Rev. Bonds (Hackensack Water), 
                MBIA, 5.9s, 3/1/24                                                  AAA           5,460,000 
    105,000     NJ Hlth. Care Fac. Finance Auth. Rev. Bonds (Bayshore Cmnty. 
                Hosp.), Issue A, MBIA, zero %, 7/1/08                               AAA              46,725 
 10,000,000     Salem Cnty, Ind. Poll. Control Fin. Auth. Rev. Bonds (Pub. 
                Svc. Elec. & Gas Co. Project), Ser A, MBIA, 5.45s, 2/1/32           AAA           8,275,000 
 10,000,000     Salem Cnty. Indl. Poll. Control Fin. Auth. Rev. Bonds (Public 
                Svc. Elec. & Gas Co. Project) Ser. C, MBIA, 6.2s, 8/1/30            AAA           9,562,500 
                                                                                                ----------- 
                                                                                                 32,095,131 
New Mexico (1.5%) 
  7,650,000     Los Alamos Cnty., Util. Sys. Rev. Bonds Ser. A, FSA, 6s, 
                7/1/15                                                              AAA           7,267,500 
  1,075,000     NM Mtge. Fin. Auth. Single Fam. Mtge. Rev. Bonds Ser. C, FGIC, 
                8-1/2s, 7/1/07                                                      AAA           1,085,750 
                                                                                                ----------- 
                                                                                                  8,353,250 
New York (8.6%) 
    635,000     Erie Cnty., Wtr. Auth. Rev. Rfdg. Bonds, AMBAC, zero %, 
                12/1/17                                                             AAA             123,825 
  1,900,000     Erie Cnty., Auth. Rev. Bonds, Ser. A, AMBAC, 2.05s, 12/1/16        VMIG1          1,900,000 
                NY City Muni. Wtr. Fin. Auth. Wtr. & Swr. Sys. Rev. Bonds, 
  7,265,000      Ser. B, FGIC, 7-1/2s, 6/15/11                                      AAA           8,191,288 
  2,735,000      Rfdg., Ser. B, FGIC, 7-1/2s, 6/15/11                               AAA           3,066,619 
 10,000,000      Ser. B, 5-5/8s, 6/15/19                                            AAA           9,125,000 
  5,500,000     NY State Dorm. Auth. Rev. Bonds (Mt. Sinai Medical School), 
                Ser. A, MBIA, 5s, 7/1/21                                            AAA           4,496,250 
  3,000,000     NY State Energy Research & Dev. Auth. Rev. Bonds (Gas 
                Facilities), MBIA, 7.539s, 7/8/26                                   AAA           2,246,250 

<PAGE>
 
New York (continued) 
 $4,350,000     NY State Med. Care Fac. Fin. Agcy. Rev. Rfdg. Bonds 
                (Mental Hlth. Svcs.), Ser. F, FSA, 5-1/4s, 2/15/21                  AAA         $ 3,637,688 
                NY State Med. Care Facs. Fin. Rev. Bonds 
                (Mental Hlth. Svcs. Fac.), 
 10,000,000     Ser. A, AMBAC, 5.8s, 8/15/22                                        AAA           9,200,000 
  5,870,000     Ser. A, FGIC, 5-1/2s, 8/15/21                                       AAA           5,150,925 
                                                                                                ----------- 
                                                                                                 47,137,845 
North Carolina (1.3%) 
  8,000,000     NC Muni. Pwr. Agcy. Rev. Bonds (Catawba Electric), 5.6s, 
                1/1/20                                                              AAA           7,280,000 
Ohio (4.0%) 
  7,390,000     Cleveland, Waterworks 1st Mtge. Rev. Bond, Ser. F-92A, AMBAC, 
                6-1/2s, 1/1/21                                                      AAA           7,888,825 
                OH Hsg. Fin. Agcy. Single Fam. Mtge. Rev. Bonds 
  3,374,000      Ser. B, GNMA Coll., 8-1/4s, 12/15/19                               AAA           3,466,785 
  6,820,000      Ser. C, GNMA Coll., 8-1/8s, 3/1/20                                 AAA           7,135,425 
 13,884,355      Ser. 85-A, FGIC, zero %, 1/15/15                                   AAA           2,030,587 
                OH State Wtr. Dev. Auth. Rev. Bonds AMBAC 
    265,000      9-3/8s, 12/1/18                                                    AAA             275,600 
  1,020,000      Rfdg. 9-3/8s, 12/1/18                                              AAA           1,066,538 
                                                                                                ----------- 
                                                                                                 21,863,760 
Oklahoma (1.1%) 
  6,020,000     OK Hsg. Fin. Agcy. Single Fam. Rev. Bonds Ser. A, GNMA Coll., 
                8-1/4s, 12/1/20                                                     AAA           6,200,600 
Pennsylvania (7.2%) 
  5,000,000     Delaware Cnty., Hlth. Care Auth. Rev. Bonds (Mercy Hlth. 
                Corp., Southeastern), Connie Lee Insd., Ser. A, 5-1/8s, 
                11/15/12                                                            AAA           4,268,750 
  4,000,000     Keystone Oaks, School Dist. Rev. Bonds, Ser. C, AMBAC, 5.829s, 
                9/1/16                                                              AAA           3,670,000 
  7,000,000     Leigh Cnty. Indl. Dev. Auth. Poll. Control Rev. Bonds (PA 
                Power & Light Co. Project-B), MBIA, 6.4s, 9/1/29                    AAA           6,947,500 
  2,000,000     Montgomery Cnty., Higher Ed. & Hlth. Auth. Hosp. Rev. Bonds 
                (Scared Heart Hosp. Norristown), Ser. A, BIGI, 6.8s, 2/1/13         AAA           1,982,500 
  4,500,000     PA State Higher Edl. Fac. Auth. Rev. Bonds (Hahnemann U. 
                Project), MBIA, 7.2s, 7/1/19                                        AAA           4,770,000 
  5,000,000     PA State COP Ser. A, AMBAC, 5s, 7/1/15                              AAA           4,131,250 
                Philadelphia, Muni-Auth. Rfdg. Rev. Bonds, FGIC, 
    620,000      DTD 8/15/93, 7.8s, 4/1/18                                          AAA             675,025 
  6,045,000      DTD 7/1/91, 7.8s, 4/1/18                                           AAA           6,672,169 
  3,000,000     Philadelphia, Regl. Port Auth. Lease IFB MBIA, 8.15s, 9/1/13        AAA           2,966,250 
  3,000,000     Philadelphia, Wtr. & Swr. Linked Floater Annuity FGIC 4.8s, 
                6/15/05                                                             AAA           1,383,750 
  2,000,000     Schuylkill Cnty., Redev. Auth. Lease Rev. Bonds Ser. A, FGIC, 
                7-1/8s, 6/1/13                                                      AAA           2,155,000 
                                                                                                ----------- 
                                                                                                 39,622,194 
<PAGE>
 
Puerto Rico (0.6%) 
 $3,700,000     Cmnwlth. of Puerto Rico, Rfdg. Rev. Bonds, MBIA, 5-1/4s, 
                7/1/18                                                              AAA         $ 3,205,125 
Rhode Island (0.8%) 
  4,315,000     RI Depositors Econ. Protection Corp. Special Oblig. Ser. A, 
                MBIA, 7-1/4s, 8/1/21                                                AAA           4,530,750 
South Carolina (2.0%) 
 12,505,000     SC State Pub. Svcs. Auth. Rev. Bonds, Ser. A, MBIA, 5-1/2s, 
                7/1/21                                                              AAA          11,020,031 
Tennessee (0.2%) 
    900,000     Metro. Nashville Arpt. Auth. Rev. Bonds FGIC, 9-3/4s, 7/1/15        AAA             934,875 
Texas (7.1%) 
                Dallas Cnty, Hsg. Fin. Corp. Single Fam. Mtge. Rev. Bonds 
                (Lomas & Nettleton Co.), FGIC 
    347,000      10s, 10/1/07                                                       AAA             357,844 
     15,000      9.2s, 7/1/06                                                       AAA              15,488 
  5,000,000     Harris Cnty., Hosp. Dist. Mtge. Rev. Rfdg. Bonds, AMBAC, 7.4s, 
                2/15/10                                                             AAA           5,531,250 
                Harris Cnty. Toll Rd. Rfdg. Rev. Bonds, 
  2,520,000      Ser. A, AMBAC, 6-5/8s, 8/15/11                                     AAA           2,649,150 
  4,000,000      Ser. A, FGIC, 6-1/2s, 8/15/17                                      AAA           4,270,000 
                Houston, Wtr. & Swr. Syst. Rev. Rfdg. Bonds, FGIC 
  2,310,000      9-3/8s, 12/1/13                                                    AAA           2,439,938 
    390,000      9-3/8s, 12/1/13                                                    AAA             411,938 
  7,000,000     Lockhart, Correctional Fac. Fin. Corp. Rev. Bonds, MBIA, 
                6-5/8s, 4/1/12                                                      AAA           7,131,250 
 10,000,000     Lower Colo. Riv. Auth. Rev. Rfdg. Jr. Lien Bonds, FSA, 5-5/8s, 
                1/1/17                                                              AAA           8,950,000 
  4,630,000     Lubbock, Hsg. Fin. Corp. Single-Fam. Mtge. Rev. Bonds, Ser. A, 
                GNMA Coll., zero %, 11/25/17                                        AAA             781,313 
  1,500,000     North Central Hlth. Fac. Dev. Corp. Rfdg. Rev. Bonds 
                (Methodist Hosp.-Dallas), Ser. A, BIGI, 9-1/2s, 10/1/15             AAA           1,576,875 
  5,000,000     Rio Grande Valley. Hlth. Fac. Dev. Corp. Hosp. IFB (Baptist 
                Med. Ctr.), Ser. B, MBIA, 9.438s, 8/1/12                            AAA           4,906,250 
                                                                                                ----------- 
                                                                                                 39,021,296 
Utah (1.0%) 
  6,400,000     Intermountain Pwr. Supply Agcy. Rev. Bonds, Ser. A, AMBAC 
                5.6s, 7/1/21                                                        AAA           5,640,000 
Virginia (2.5%) 
 10,000,000     Fredericksburg, Indl. Dev. Auth. Hosp. Fac. IFB FGIC, 9.773s, 
                8/15/23                                                             AAA          10,312,500 
  3,000,000     Roanoke Cnty., Wtr. Sys. Rev. Bonds, FGIC, 6-1/2s, 7/1/21           AAA           3,202,500 
                                                                                                ----------- 
                                                                                                 13,515,000 
Washington (1.9%) 
                WA State Pub. Pwr. Supply Syst. Rev. Bonds, 
  3,400,000      (Nuclear Project No. 2), Ser. C, FGIC, 7-3/8s, 7/1/11              AAA           3,757,000 
  6,000,000      (Nuclear Project No. 3), Ser. B, MBIA, 7.12s, 7/1/16               AAA           6,420,000 
                                                                                                ----------- 
                                                                                                 10,177,000 

<PAGE>
 
West Virginia (--%) 
   $140,000     WV Hsg. Dev. Auth. Home Ownership Mtge. Rev. Bonds 
                Ser. A., FGIC, 9.1s, 1/1/14                                         AAA        $    143,500 
Wisconsin (1.4%) 
  2,000,000     Superior, Ltd. Oblig. Rev. Rfdg. Bonds (Midwest Energy 
                Resources), Ser. E, FGIC, 6.9s, 8/1/21                              AAA           2,107,500 
  5,000,000     WI Hlth. Fac. Auth. Rev. Bonds (Meriter Hosp. Inc.), FGIC, 
                8-3/8s, 12/1/09                                                     AAA           5,487,500 
                                                                                                ----------- 
                                                                                                  7,595,000 
Wyoming (1.0%) 
  5,000,000     Laramie Cnty., Indl. Dev. Rev. Bonds (Cheyenne Lt. & Fuel & 
                Pwr. Co.), Ser. A, AMBAC, 7-1/4s, 9/1/21                            AAA           5,212,494 
                                                                                                ----------- 
                Total Municipal Bonds and Notes (cost $524,136,300)                            $534,027,831 
PUT OPTIONS PURCHASED (cost $113,150) (--%)*                    EXPIRATION DATE/                      VALUE 
NUMBER OF CONTRACTS                                                STRIKE PRICE 
10              U.S. Treasury Bond Futures                   March 1995/$100.00                $     34,000 
                Total Investments (cost $524,249,450)***                                       $534,061,831 
</TABLE>

<PAGE>
NOTES 

* Percentages indicated are based on net assets of $547,352,027, which 
correspond to a net asset value per class A and class B share of $14.33 and 
$14.34, respectively. 

** The Moody's or Standard & Poor's ratings indicated are believed to be the 
most recent ratings available at January 31, 1995 for the securities listed. 
Ratings are generally ascribed to securities at the time of issuance. While 
the agencies may from time to time revise such ratings, they undertake no 
obligation to do so, and the ratings do not necessarily represent what the 
agencies would ascribe to these securities at January 31, 1995. Securities 
rated by Putnam are indicated by "/P" and are not publicly rated. 

# A portion of this security was pledged to cover margin requirements for 
futures contracts at January 31, 1995. The market value of segrated 
securities with the custodian for transactions on futures contract is 
$2,872,500 or 0.5% of net assets. 

*** The aggregate identified cost on a tax cost basis is $524,406,986, 
resulting in gross unrealized appreciation and depreciation of $20,946,199, 
and $11,291,354, respectively, or net unrealized appreciation of $9,654,845. 

The rates shown on Variable Rate Demand Notes (VRDN), Inverse Floating Bonds 
(IFB) and linked Floater Annuties which are securities paying variable 
interest rates that vary inversely to changes in the market interest rates, 
are the current interest rates at January 31, 1995, which are subject to 
change based on terms of the security. 

The Fund had the following industry group concentrations greater than 10% at 
January 31, 1995 (as a percentage of net assets): 

Utilities                      22.5% 
Hospitals / Health Care        19.1 
Water & Sewerage               12.0 
Housing                        11.9 

The Fund had the following insurance concentrations greater than 10% at 
January 31, 1995 (as a percentage of net assets): 

MBIA          34.1% 
FGIC           18.5 
AMBAC          21.1 
<PAGE>

WRITTEN OPTIONS OUTSTANDING 
(PREMIUMS RECEIVED $2,324) 
NUMBER OF                           EXPIRATION DATE/ 
CONTRACTS                              STRIKE PRICE                       VALUE 
20 U.S. Treasury Bond Futures      March 1995/$100.00                    $3,625 

U.S. Treasury Bond Futures Outstanding at January 31, 1995 
<TABLE>
<CAPTION>
                                          Total          Aggregate       Expiration      Unrealized/ 
                                          Value          Face Value         Date         Depreciation 
<S>                                    <C>              <C>               <C>            <C>
U.S. Treasury Bond Futures (Sell)      $55,807,813      $54,500,000       March/95       $(1,307,813) 
</TABLE>

<PAGE>

Statement of assets and liabilities 
January 31, 1995 (Unaudited) 
<TABLE>
<CAPTION>
 Assets 
<S>                                                                     <C>
Investments in securities, at value (identified cost $524,249,450) 
  (Note 1)                                                              $534,061,831 
Cash                                                                       3,381,147 
Interest receivable                                                        8,494,033 
Receivable for shares of the fund sold                                    27,498,611 
Receivable for securities sold                                             4,350,716 
                                                                        ------------ 
Total assets                                                            $577,786,338 
Liabilities 
Distributions payable to shareholders                                      1,012,596 
Payable for shares of the fund repurchased                                28,505,285 
Payable for compensation of Manager (Note 2)                                 273,670 
Payable for investor servicing and custodian fees (Note 2)                     3,144 
Payable for administrative services (Note 2)                                  10,496 
Payable for variation margin on open futures contracts                       257,813 
Payable for distribution fees (Note 2)                                       308,775 
Other accrued expenses                                                        58,907 
Written options outstanding (premium received $2,324)                          3,625 
                                                                        ------------ 
Total liabilities                                                         30,434,311 
                                                                        ------------ 
Net assets                                                              $547,352,027 
Represented by 
Paid-in capital (Notes 1 and 4)                                          547,434,105 
Distributions in excess of net investment income (Note 1)                   (893,047) 
Accumulated net realized loss on investment and futures 
  transactions (Note 1)                                                   (7,692,298) 
Net unrealized appreciation of investments, futures contracts and 
  options                                                                  8,503,267 
                                                                        ------------ 
Total -- Representing net assets applicable to capital shares 
  outstanding                                                           $547,352,027 
Net asset and redemption price of class A shares ($180,044,836 
  divided by 12,561,398 shares)                                               $14.33 
Offering price per class A share (100/95.25 of $14.33)*                       $15.04 
Net asset value and offering price of class B share ($367,307,191 
  divided by 25,607,103 shares)**                                             $14.34 
</TABLE>
*On single retail sales of less than $25,000. On sales of $25,000 or more and 
on group sales the offering price is reduced 
**Redemption price per share is equal to net asset value less any applicable 
contingent deferred sales charge. 

  The accompanying notes are an integral part of these financial statements. 
<PAGE>

Statement of operations 
Six months ended January 31, 1995 (Unaudited) 
<TABLE>
<S>                                                                 <C>
Tax exempt interest income                                         $ 18,647,253 
Expenses: 
Compensation of Manager (Note 2)                                   $  1,639,344 
Investor servicing and custodian fees (Note 2)                          173,173 
Compensation of Trustees (Note 2)                                         9,601 
Reports to shareholders                                                  16,989 
Auditing                                                                 16,972 
Legal                                                                     7,562 
Postage                                                                  30,248 
Administrative services (Note 2)                                          9,187 
Registration fees                                                        32,667 
Distribution fees--Class A (Note 2)                                     144,061 
Distribution fees--Class B (Note 2)                                   1,746,132 
Other                                                                     5,886 
                                                                   ------------ 
Total expenses                                                        3,831,822 
                                                                   ------------ 
Net investment income                                                14,815,431 
Net realized loss on investments (Notes 1 and 3)                     (3,229,732) 
Net realized gain on futures contracts (Notes 1 and 3)                  558,878 
Net unrealized depreciation of investments, futures contracts 
  and options during the year                                       (10,729,911) 
                                                                   ------------ 
Net loss on investment transactions                                 (13,400,765) 
                                                                   ------------ 
Net increase in net assets resulting from operations               $  1,414,666 
</TABLE>
  The accompanying notes are an integral part of these financial statements. 

<PAGE>
Statement of changes in net assets 
<TABLE>
<CAPTION>
                                                   Six months 
                                                     ended            Year ended 
                                                  January 31*          July 31 
                                                      1995               1994 
<S>                                               <C>                <C>
Increase (decrease) in net assets 
Operations: 
Net investment income                             $ 14,815,431       $ 29,208,200 
Net realized loss on investments                    (3,229,732)          (846,042) 
Net realized gain on futures contracts                 558,878            856,097 
Net unrealized depreciation of investments, 
  futures contracts and options                    (10,729,911)       (29,129,498) 
Net increase in net assets resulting from 
  operations                                         1,414,666             88,757 
Distributions to shareholders: 
From net investment income 
Class A                                             (4,228,163)        (7,004,732) 
Class B                                            (10,702,177)       (22,142,492) 
From net realized gain on investments 
Class A                                                (50,889)            (2,495) 
Class B                                               (140,141)            (7,560) 
In excess of net realized gain on 
  investments and futures 
Class A                                                --                (932,962) 
Class B                                                --              (2,827,335) 
Increase (decrease) from capital share 
  transactions (Note 4)                            (14,915,495)        36,144,510 
Total increase (decrease) in net assets            (28,622,199)         3,315,691 
Net assets 
Beginning of period                                575,974,226        572,658,535 
End of period (including distributions in 
  excess of net investment income of 
  $893,047 and $778,138, respectively)            $547,352,027       $575,974,226 
</TABLE>
*Unaudited 
  The accompanying notes are an integral part of these financial statements. 

<PAGE>
 
Financial Highlights 
(For a share outstanding throughout the period) 
<TABLE>
<CAPTION>
                                                 For the period 
                                                  September 20, 
                                                      1993 
                                                  (commencement 
                                 Six months      of operations)            Six months 
                                   ended               to                     ended 
                                January 31*          July 31               January 31*               Year ended July 31 
                                    1995              1994                    1995           1994          1993           1992 
                                            Class A                                               Class B 
<S>                             <C>               <C>                      <C>           <C>      <C>  <C>            <C>
Net asset value, beginning 
  of period                       $   14.67       $     15.88              $     14.68   $     15.50   $     15.42    $     14.38 
   
Investment operations 
Net investment income                   .42               .73                      .37           .74           .75            .76 
   
Net realized and unrealized 
  gain (loss) on 
  investments                          (.33)            (1.12 )                   (.33)         (.73)          .28           1.14 
   
Total from investment 
  operations                            .09              (.39 )                    .04           .01          1.03           1.90 
   
Less distributions: 
From net investment income             (.42)             (.72 )                   (.37)         (.73)         (.75)          (.77) 
From net realized gain on 
  investments                          (.01)           --                         (.01)       --              (.20)          (.09) 
In excess of net realized 
  gain on investments                --                  (.10 )                 --              (.10)       --             -- 
Total distributions                    (.43)             (.82 )                   (.38)         (.83)         (.95)          (.86) 
Net asset value, end of 
  period                          $   14.33       $     14.67              $     14.34   $     14.68   $     15.50    $     15.42 
   
Total investment return at 
  net asset value (%) (b)               .64(c)          (2.49 )(c)                 .32(c)      --             7.00          13.63 
   
Net assets, end of period 
  (in thousands)                   $180,045          $143,079                 $367,307      $432,895      $572,659       $466,135 
Ratio of expenses to 
  average net assets (%)               0.45(c)            .80 (c)                 0.78(c)        1.53         1.74           1.79 
   
Ratio of net investment 
  income to average net 
  assets (%)                           2.94(c)           4.73 (c)                 2.61(c)        4.81         4.88           5.16 
   
Portfolio turnover (%)                16.94(c)          47.72 (c)                16.94(c)       47.72        42.01          66.18 
   
</TABLE>
See page 22 for notes to Financial Highlights. 

  The accompanying notes are an integral part of these financial statements. 

<PAGE>
 
<TABLE>
<CAPTION>
                                                                                                       For the period 
                                                                                                        September 9, 
                                                                                                            1985 
                                                                                                       (commencement 
                                                                                                     of operations) to 
                                                       Year ended July 31                                 July 31 
                                     1991          1990          1989       1988          1987              1986 
                                                                       Class B 
<S>                           <C>           <C>           <C>           <C>           <C>               <C>
Net asset value, beginning 
  of period                     $   14.25   $     14.79   $     13.85   $     13.77   $     13.91       $     12.57 
Investment operations 
Net investment income                 .79           .83           .85           .85           .84               .73(a) 
Net realized and unrealized 
  gain (loss) on 
  investments                         .14          (.06)          .93           .11          (.10)             1.41 
Total from investment 
  operations                          .93           .77          1.78           .96           .74              2.14 
Less distributions: 
From net investment income           (.80)         (.83)         (.84)         (.85)         (.84)             (.80) 
From net realized gain on 
  investments                      --              (.48)       --              (.03)         (.04)           -- 
In excess of net realized 
  gain on investments              --            --            --            --            --                -- 
Total distributions                  (.80)        (1.31)         (.84)         (.88)         (.88)             (.80) 
Net asset value, end of 
  period                        $   14.38     $   14.25     $   14.79     $   13.85     $   13.77         $   13.91 
Total investment return at 
  net asset value (%) (b)            6.79          5.49         13.31          7.24          5.31             17.33(c) 
Net assets, end of period 
  (in thousands)                 $359,465      $309,050      $293,127      $268,004      $264,916          $195,386 
Ratio of expenses to 
  average net assets (%)             1.68          1.63          1.61          1.58          1.61              1.42(a)(c) 
Ratio of net investment 
  income to average net 
  assets (%)                         5.60          5.81          6.01          6.20          5.83              5.26(a)(c) 
Portfolio turnover (%)              54.69         86.29        201.21        197.29         85.49            125.36(c) 
</TABLE>
* Unaudited. 

(a) Reflects a waiver of a portion of the distribution plan payments during 
the period. As a result of this waiver, expenses of the Fund at July 31, 1986 
reflect a reduction of $0.01 per share. 

(b) Total investment return assumes dividend reinvestment and does not 
reflect the effect of sales charges. 

(c) Not annualized. 

  The accompanying notes are an integral part of these financial statements. 
<PAGE>
 

Notes to financial statements 
January 31, 1995 (Unaudited) 

Note 1 
Significant accounting policies 

The fund is a series of Putnam Tax-Free Income Trust (the "Trust") which is 
registered under the Investment Company Act of 1940, as amended, as a 
diversified, open-end management investment company. The fund pursues its 
objective of seeking high current income exempt from federal income tax by 
primarily investing in tax exempt securities that are covered by insurance 
guaranteeing the timely payment of principal and interest, are rated AAA or 
Aaa, or are backed by the U.S. government. 

The fund offers both class A and class B shares. Class A shares are sold with 
a maximum front-end sales charge of 4.75%. Class B shares do not pay a front- 
end sales charge but pay a higher ongoing distribution fee than class A 
shares and are subject to a contingent deferred sales charge if those shares 
are redeemed within six years of purchase. Expenses of the fund are borne 
pro-rata by the shareholders of both classes of shares, except that each 
class bears expenses unique to that class (including the distribution fees 
applicable to such class). Each class votes as a class only with respect to 
its own distribution plan or other matters on which a class vote is required 
by law or determined by the Trustees. Shares of each class would receive 
their pro-rata share of the net assets of the fund if the fund were 
liquidated. In addition, the Trustees declare separate dividends on each 
class of shares. 

The following is a summary of significant accounting policies consistently 
followed by the fund in the preparation of its financial statements. The 
policies are in conformity with generally accepted accounting principles. 

A) Security valuation Tax-exempt bonds and notes are stated on the basis of 
valuations provided by a pricing service, approved by the Trustees, which 
uses information with respect to transactions in bonds, quotations from bond 
dealers, market transactions in comparable securities and various 
relationships between securities in determining value. 

B) Security transactions and related investment income Security transactions 
are accounted for on the trade date (date the order to buy or sell is 
executed). Interest income is recorded on the accrual basis. 

C) Futures A futures contract is an agreement between two parties to buy and 
sell a security at a set price on a future date. Upon entering into such a 
contract, the fund is required to pledge to the broker an amount of cash or 
securities equal to the minimum "initial margin" requirements of the 
exchange. Pursuant to the contract, the fund agrees to receive from or pay to 
the broker an amount of cash equal to the daily fluctuation in value of the 
contract. Such receipts or payments are known as "variation margin," and are 
recorded by the fund as unrealized gains or losses. When the contract is 
closed, the fund records a realized gain or loss equal to the difference 
between the value of the contract at the time it was opened and the value at 
the time it was closed. The potential risk to the fund is that the change in 
value of the underlying securities may not correspond to the change in value 
of the futures contracts. 

D) Federal taxes It is the policy of the fund to distribute all of its income 
within the prescribed time and otherwise comply with the provisions of the 
Internal Revenue Code applicable to regulated investment companies. It is 
also the intention of the fund to distribute an amount sufficient to avoid 
imposition of any excise tax under Section 4982 of the Internal Revenue Code 
of 1986. 

<PAGE>
 
Therefore, no provision has been made for federal taxes on income, capital 
gains or unrealized appreciation of securities held or excise tax on income 
and capital gains. 

E) Distributions to shareholders Income dividends are recorded daily by the 
fund and are distributed monthly. Capital gain distributions are recorded on 
the ex-dividend date and paid annually, or as necessary to meet the 
distribution requirements described above. 

The amount and character of income and gains to be distributed are determined 
in accordance with income tax regulations which may differ from generally 
accepted accounting principles. 

F) Amortization of bond premium and discount Any premium resulting from the 
purchase of securities is amortized using the effective yield method for 
bonds issued after September 27, 1985, and on a straight-line basis for bonds 
issued prior thereto. The premium in excess of the call price, if any, is 
amortized to the call date: thereafter, the remaining excess premium is 
amortized to maturity. Discount on zero-coupon and stepped coupon bonds is 
accreted according to the effective yield method. 

G) Expenses of the Trust Expenses directly charged or attributable to the 
fund will be paid from the assets of the fund. Generally, expenses of the 
Trust will be allocated and charged to the assets of each fund on a basis 
that the Trustees deem fair and equitable, which may be based on the relative 
assets of each fund or the nature of the services performed and relative 
applicability to each fund. 

Note 2 
Management fee, administrative 
services, and other transactions 

Compensation of Putnam Investment Management Inc. ("Putnam Management"), the 
fund's Manager, a wholly- owned subsidiary of Putnam Investments, Inc., for 
management and investment advisory services is paid quarterly based on the 
average net assets of the fund for the quarter. Such fee is based on 0.6% of 
the first $500 million of average net assets; 0.5% of the next $500 million; 
0.45% of the next $500 million and 0.4% of any amount over $1.5 billion. Such 
fees are subject to reduction, under current law, in any year to the extent 
that expenses (exclusive of distribution fees, brokerage, interest and taxes) 
of the fund exceed 2.5% of the first $30 million of average net assets, 2.0% 
of the next $70 million and 1.5% of any amount over $100 million and by the 
amount of certain brokerage commissions and fees (less expenses) received by 
affiliates of the Manager of the fund's portfolio transactions. 

The fund also reimburses the manager for the compensation and related 
expenses of certain officers of the fund and their staff who provide 
administrative services to the fund. The aggregate amount of all such 
reimbursements is determined annually by the Trustees. 

Trustees of the fund receive an annual Trustee's fee of $1,240, and an 
additional fee for each Trustees' meeting attended. Trustees who are not 
interested persons of the Manager and who serve on committees of the Trustees 
receive additional fees for attendance at certain committee meetings. 

Custodial functions are being provided to the fund by Putnam Fiduciary Trust 
Company (PFTC), a subsidiary of Putnam Investments, Inc. Investor servicing 
agent functions are provided by Putnam Investor Services, a division of PFTC. 
Investor servicing and custodian fees reported in the Statement of operations 
for the six months ended January 31, 1995 have been reduced by credits 
allowed by PFTC. 

<PAGE>
 
The fund has adopted a distribution plan with respect to its class A shares 
(the "Class A Plan") pursuant to rule 12b-1 under the Investment Company Act 
of 1940. The purpose of the Class A Plan is to compensate Putnam Mutual Funds 
Corp., a wholly-owned subsidiary of Putnam Investments, Inc., for services 
provided and expenses incurred by it in distributing class A shares. The 
Trustees have approved payment by the fund to Putnam Mutual Funds Corp. at an 
annual rate of up to 0.20% of the fund's average net assets attributable to 
class A shares. 

During the six months ended January 31, 1995, Putnam Mutual Funds Corp., 
acting as the underwriter, received net commissions of $6,364 from the sale 
of class A shares of the fund. 

A deferred sales charge of up to 1% is assessed on certain redemption of 
class A shares purchased as part of an investment of $1 million or more. For 
the six months ended January 31, 1995, Putnam Mutual Funds Corp., acting as 
the underwriter, received no monies on class A redemptions. 

The fund has adopted a separate distribution plan with respect to its class B 
shares (the "Class B Plan") pursuant to Rule 12b-1 under the Investment 
Company Act of 1940. The purpose of the Class B Plan is to compensate Putnam 
Mutual Funds Corp. for services provided and expenses incurred by it in 
distributing class B shares. The Class B Plan provides for payments by the 
fund to Putnam Mutual Funds Corp. at an annual rate of up to 0.85% of the 
fund's average net assets attributable to class B shares. For the six months 
ended January 31, 1995, the fund paid Putnam Mutual Funds Corp. distribution 
fees of $397,930 for class B shares. 

Putnam Mutual Funds Corp. also receives the proceeds of contingent deferred 
sales charges levied on class B share redemptions within six years of 
purchase. The charge is based on declining rates, which begins at 5% of the 
net asset value of the redeemed shares. For the six months ended January 31, 
1995, Putnam Mutual Funds Corp. received contingent deferred sales charges of 
$492,662 from such redemptions. 

Note 3 
Purchases and sales of securities 

During the six months ended January 31, 1995, purchases and sales of 
investment securities other than short-term municipal obligations aggregated 
$149,489,035 and $177,166,437, respectively. In determining the net gain or 
loss on securities sold, the cost of securities has been determined on the 
identified cost basis. 

Written option transactions on U.S. Treasury Bond futures during the period 
are summarized as follows: 
<TABLE>
<CAPTION>
                                  Premiums 
                                  Received 
<S>                               <C>
Options written                   $2,324 
Written options outstanding 
  at end of period                $ 2,324 
</TABLE>
Note 4 Capital shares 


At January 31, 1995, there was an unlimited number of shares of beneficial 
interest authorized divided into class A and class B shares. Transactions in 
capital shares were as follows: 

<PAGE>
<TABLE>
<CAPTION>
                                                                    September 20, 1993 
                                                                       (commencement 
                                Six months ended                     of operations) to 
                                   January 31                             July 31 
                                      1995                                 1994 
Class A                    Shares            Amount             Shares             Amount 
<S>                       <C>              <C>                <C>               <C>
Shares sold                3,730,494       $ 52,886,340        10,582,170       $ 168,126,740 
Shares issued in 
  connection with 
  reinvestment of 
  distributions              176,824          2,500,138           345,090           4,608,153 
                           3,907,318         55,386,478        10,927,260         172,734,893 
Shares repurchased        (1,097,030)       (15,517,292)       (1,176,150)        (17,969,942) 
Net increase               2,810,288       $ 39,869,186         9,751,110       $ 154,764,951 
                                 Six months ended 
                                     January 31                        Year ended July 31 
                                       1995                                  1994 
Class B                     Shares            Amount             Shares             Amount 
Shares sold                1,220,417       $ 17,294,800         4,899,248       $  75,602,157 
Shares issued in 
  connection with 
  reinvestment of 
  distributions              479,878          6,791,437         1,046,236          16,046,023 
                           1,700,295         24,086,237         5,945,484          91,648,180 
Shares repurchased        (5,575,640)       (78,870,918)      (13,406,532)       (210,268,621) 
Net decrease              (3,875,345)      $(54,784,681)       (7,461,048)      $(118,620,441) 
</TABLE>

<PAGE>

  Our commitment to quality service 



> CHOOSE AWARD-WINNING SERVICE. 

Putnam Investor Services has won the DALBAR Quality Tested Service Seal for 
the past five years, through 1994. DALBAR, an independent research firm, ran 
more than 10,000 tests of 38 shareholder service components. In every 
category, Putnam outperformed the industry standard. 



> HELP YOUR INVESTMENT GROW. 

Set up a systematic program for investing with as little as $25 a month from 
a Putnam fund or from your checking or savings account.* 



> SWITCH FUNDS EASILY. 

You can move money from one account to another with the same class of shares 
without a service charge. (This privilege is subject to change or 
termination.) 



> ACCESS YOUR MONEY QUICKLY. 

You can get checks sent regularly or redeem shares any business day at the 
then-current net asset value, which may be more or less than their original 
cost. 

For details about any of these or other services, contact your financial 
advisor or call the toll-free number shown below and speak with a helpful 
Putnam representative. 

> To make an additional investment in this or any other Putnam fund, contact 
your financial advisor or call our toll-free number: 1-800-225-1581. 

*Regular investing, of course, does not guarantee a profit or protect against 
a loss in a declining market. Investors should consider their ability to 
continue purchasing shares during periods of low price levels. 

<PAGE>
 
Fund information

INVESTMENT MANAGER 
Putnam Investment 
Management, Inc. 
One Post Office Square 
Boston, MA 02109 

MARKETING SERVICES 
Putnam Mutual Funds Corp. 
One Post Office Square 
Boston, MA 02109 

CUSTODIAN 
Putnam Fiduciary Trust Company 

LEGAL COUNSEL 
Ropes & Gray 

TRUSTEES 
George Putnam, Chairman 
William F. Pounds, Vice Chairman 
Jameson Adkins Baxter 
Hans H. Estin 
John A. Hill 
Elizabeth T. Kennan 
Lawrence J. Lasser 
Robert E. Patterson 
Donald S. Perkins 
George Putnam, III 
A.J.C. Smith 
W. Nicholas Thorndike 

OFFICERS 
George Putnam 
President 

Charles E. Porter 
Executive Vice President 

Patricia C. Flaherty 
Senior Vice President 

Lawrence J. Lasser 
Vice President 

Gordon H. Silver 
Vice President 


Gary N. Coburn 
Vice President 


James E. Erickson 
Vice President 

Richard P. Wyke 
Vice President and Fund Manager 

William N. Shiebler 
Vice President 

John R. Verani 
Vice President 

Paul M. O'Neil 
Vice President 

John D. Hughes 
Vice President and Treasurer 

Beverly Marcus 
Clerk and Assistant Treasurer 

This report is for the information of shareholders of Putnam Tax-Free Insured 
Fund. It may also be used as sales literature when preceded or accompanied by 
the current prospectus, which gives details of sales charges, investment 
objectives and operating policies of the fund, and the most recent copy of 
Putnam's Quarterly Performance Summary. For more information or to request a 
prospectus, call toll free 1-800-225-1581. 


Shares of mutual funds are not deposits or obligations of, or guaranteed or 
endorsed by, any financial institution, are not insured by the Federal 
Deposit Insurance Corporation (FDIC), the Federal Reserve Board or any other 
agency, and involve risk, including the possible loss of principal amount 
invested. 

<PAGE>
 

Bulk Rate 
U.S. Postage 
PAID 
Putnam 
Investments 
438/035-16924 




<PAGE>

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AND EDGAR-FILED TEXTS:

(1)  Bold and italic typefaces are displayed in normal type.

(2)  Headers (e.g., the name of the fund) are omitted.

(3)  Certain tabular and columnar headings and symbols are displayed 
     differently in this filing.

(4)  Bullet points and similar graphic signals are omitted.

(5)  Page numbering is omitted.

(6)  Trademark symbol replaced with (TM)


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