MFS VARIABLE INSURANCE TRUST
N-30D, 1996-08-29
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<PAGE>

[Logo]
THE FIRST NAME IN MUTUAL FUNDS                                 SEMIANNUAL REPORT
                                                                   JUNE 30, 1996




       MFS(R) EMERGING GROWTH SERIES
       A SERIES OF MFS(R) VARIABLE INSURANCE TRUST





            [graphic omitted: two men sitting in front of a window]

<PAGE>

MFS(R) EMERGING GROWTH SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

TRUSTEES                                INVESTMENT ADVISER
A. Keith Brodkin*                       Massachusetts Financial Services Company
Chairman and President                  500 Boylston Street
Nelson J. Darling, Jr.                  Boston, MA 02116-3741
Trustee, Eastern Enterprises
(diversified holding company)           DISTRIBUTOR
                                        MFS Fund Distributors, Inc.
William R. Gutow                        500 Boylston Street
Vice Chairman,                          Boston, MA 02116-3741
Capitol Entertainment
(Blockbuster Video Franchise)           SHAREHOLDER SERVICE CENTER
                                        MFS Service Center, Inc.
PORTFOLIO MANAGERS                      P.O. Box 1400
John W. Ballen*                         Boston, MA 02107-9906
Toni Y. Shimura*
                                        For additional information,
TREASURER                               contact your financial adviser.
W. Thomas London*
                                        CUSTODIAN
ASSISTANT TREASURER                     Investors Bank & Trust Company
James O. Yost*
                                        AUDITORS
SECRETARY                               Deloitte & Touche LLP
Stephen E. Cavan*

ASSISTANT SECRETARY
James R. Bordewick, Jr.*


*Affiliated with the Investment Adviser

<PAGE>

Dear Contract Owner:
Rising global liquidity has underpinned international equity markets over the
past six months, and equities so far have ignored the "growth scare" that has
affected most bond markets in 1996. Low interest rates in Europe and Japan and
a growing money supply, plus signs of economic recovery and accelerating
corporate earnings in those areas, have reinforced the positive message coming
from the U.S. equity market. Investors in these markets believe that the same
trends are at work as in the United States, but that the international markets
are in an earlier phase of their cycle. For the six months ended June 30,
1996, the U.S. stock market, as measured by the Standard & Poor's 500
Composite Index (the S&P 500), a popular, unmanaged index of common stock
performance, returned 10.09%.

U.S. Outlook
Real (inflation-adjusted) economic growth in the first quarter of 1996 was
2.3% on an annualized basis, and it appears that second-quarter growth could
be even stronger. Thus, real growth in gross domestic product has started the
year at a rate exceeding our expectations. While we continue to believe that
growth from quarter to quarter will be uneven, it is now our expectation that
growth for all of 1996 could exceed 2.5%. Although individual consumers appear
to be carrying an excessive debt load, the consumer sector itself, which
represents two-thirds of the economy, continues to be impressive as the auto
and housing markets remain resilient. Consumer spending has also been
positively impacted by widespread job growth. At the same time, however, the
economies of Europe and Japan continue to be in the doldrums, weakening U.S.
export markets while subduing the capital spending plans of American
corporations. Finally, due to the pickup in economic activity and increasing
job growth, it appears that inflation may accelerate slightly this year, and
the Federal Reserve Board is expected to continue its diligent anti-
inflationary stance.

Global Outlook
The first half of 1996 has seen a continuation of the positive performance of
global equity markets exhibited in 1995. Positive local currency returns were
generated throughout the world. The Morgan Stanley Capital International
(MSCI) Europe Index was up 10.4%, with returns ranging from 2.6% in the United
Kingdom to 20.9% in Spain; the MSCI Pacific Index was up 7.5%, with returns
ranging from -2.2% in New Zealand to 14.3% in Malaysia. The MSCI indices are
unmanaged, market-capitalization-weighted total return indices of global stock
market performance. Meanwhile, the S&P 500 gained 10.1%, and the IFC
(International Finance Corporation) Global Composite Index, a market-
capitalization-weighted index comprising the most active stocks of emerging
markets (as defined by the World Bank), rose 13.5%. The only major negative
was the strong U.S. dollar, which gained 6% against the Japanese yen and the
German mark and ate into dollar-based returns. We believe that the equity
markets will continue to be fundamentally driven, although the economic
outlook is uncertain, with the strength of the U.S. economy unclear, Japan
starting to show more meaningful signs of recovery, and Europe's recovery
still in its early stages. Lower interest rates, particularly in Europe and
Japan, have helped support strong equity markets. While we believe that
interest rates are unlikely to fall further, a subdued global inflation
outlook could mean that rates rise little from current levels, which should
help support current equity market valuations. Therefore, for the remainder of
1996, we believe corporate earnings growth will be the key to further stock
market gains. It is not possible to invest in an index.

Bond Markets
Persistent signs of economic weakness led to decreases in short-term interest
rates by the Federal Reserve in late 1995 and early 1996. However, should
signs of economic growth and, particularly, of higher inflation continue, we
would expect the Fed to maintain its anti-inflationary stance. In the
beginning of the year, bond markets were trading in a narrow range, as
investors shifted between concern about the lack of a budget resolution in
Washington and hopes that sluggish economic reports and low inflation might
lead to lower interest rates. Later, fixed-income markets began reacting to
conflicting signals regarding the strength of the economy with more-volatile
trading patterns marked by an upward bias in interest rates. Interest rates
may move even higher over the coming months, but we believe the current rise
in bond yields is reaching a point where fixed-income markets are becoming
attractively valued.

    In world bond markets, the most important development has been the better-
than-expected strength of the U.S. economy. Market expectations for further
interest rate reductions by the Federal Reserve have shifted to concerns of
possible interest rate increases as growth has appeared to be in an above-
trend pattern. Long-term interest rates have also risen, reflecting increased
concerns about inflation and disappointment with the failed attempt to reach
an accord on the federal budget. The rise in U.S. rates has helped push up
rates worldwide, although foreign rates have generally risen less than in the
United States. The overperformance has been most pronounced in some of the
higher-yielding European bond markets.

    Overall, the combination of rising interest rates and a stronger dollar
has translated into negative performance for international bonds. Looking
forward, we believe dollar strength may continue until growth in Europe, and
especially in Germany, rebounds, which we expect to occur in the second half
of this year. The outlook for world growth is continuing to improve and, thus,
some caution regarding bond markets is probably warranted.

Stock Market
While we do not expect the U.S. stock market to match the extraordinary
performance of 1995, we continue to be positive about the equity market this
year. Although we believe the equity market represents fair value at current
levels, the expected slowdown in the growth of corporate earnings and the
increases in interest rates experienced so far this year raise near-term
concerns. Further increases in interest rates, and an acceleration of
inflation coupled with an additional slowdown in corporate earnings growth,
could have a negative effect on the stock market. However, to the extent that
some earnings disappointments are taken as a sign that the economy is not
overheating, this may prove beneficial for the longer-term health of the
equity market. We continue to believe that many of the technology-driven
productivity gains that U.S. companies have made in recent years will continue
to enhance corporate America's competitiveness and profitability. Therefore,
while we have some near-term concerns, we remain quite constructive on the
long-term viability of the equity market.

    Comments from the portfolio managers of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin        /s/ John W. Ballen             /s/ Toni Y. Shimura
    A. Keith Brodkin            John W. Ballen                 Toni Y. Shimura
    Chairman and President      Portfolio Manager              Portfolio Manager

July 10, 1996

MFS(R) EMERGING GROWTH SERIES
For the six months ended June 30, 1996, the Series provided a total return of
15.07%. This compares to an 11.92% return for the Russell 2000 Total Return
Index (the Russell 2000) for the same period. The Russell 2000 is an unmanaged
index comprised of 2,000 of the smallest U.S.-domiciled companies' common
stocks (on the basis of capitalization) that are traded in the United States
on the NYSE, AMEX, and NASDAQ. It is not possible to invest in an index. The
Series' performance has benefited from the strong appreciation in the stock
prices of many of its holdings in the technology and consumer sectors. The
technology sector started the year with very poor performance as investors
worried about the slowdown in this sector's earnings growth versus 1995's very
strong earnings growth rate of 50%. However, once investors became accustomed
to the fact that 1996 earnings for the technology sector would still be in a
range of 25% to 30%, and that this growth would appear to be very strong
versus corporate America as a whole, the sector rebounded strongly.

    Consumer stocks, which were some of the most disappointing in terms of
earnings and stock performance in 1995, have rebounded very smartly in the
first half of 1996. One sector which has not performed as yet for the Series
in 1996 is health care. Perhaps because of the strength in other areas of the
market, many of our health care companies have lagged the general market in
spite of strong earnings growth.

    The performance of our consumer-oriented stocks has been particularly
helpful. HFS, the nation's largest franchiser of hotels and real estate
companies, saw the price of its stock appreciate almost 50% as strong earnings
gains and acquisitions appeared to assure investors of its future growth
prospects. In our opinion, HFS has one of the most creative and shareholder-
oriented managements around, and this position is the Series' largest.

    Several of the Series' retail and restaurant stocks rebounded dramatically
based on strong consumer sentiment. Applebee's, the nation's largest
franchiser of casual restaurants, appreciated substantially as strong earnings
were reported from the first quarter.

    While the Series' technology stocks had, on average, mixed results, the
Series, fortunately, was overweighted in software and networking stocks
relative to computer systems and semiconductors. Stocks of software and
networking companies such as Oracle and Cisco responded quite positively to
strong earnings reports. Meanwhile, an excess of semiconductor manufacturing
investors has been a drag on earnings for this sector so far this year. While
we expect this overhang to dissipate, other investors have aggressively sold
their positions and depressed the stocks.

    We have been surprised that our health care stocks have not performed
better. United Healthcare, the largest managed health care company in the
nation and one of the Series' largest positions, has been a particularly poor
performer this year. Despite reporting strong earnings versus last year and
maintaining its position as a dominant force in the sector, the stock is down
for the year. We expect the health maintenance organization (HMO) companies to
perform better by the end of the year, and have recently added to our holdings
in this area with stocks such as Healthsource, which operates HMOs in New
England, the Midwest, and the Southeast.

    This year, the stock market and the Series' investments moved higher
despite a rise in interest rates and a slowdown in overall corporate earnings.
While we have not been surprised by the strong performance of smaller
companies relative to larger companies, we have been surprised by how strong
the market has been this year. We believe 1996 could end with smaller
companies substantially outperforming larger companies. We are living through
an unprecedented time of productivity gains for corporate America. We believe
the smaller companies are the ones that are providing the technology and
resources to drive this productivity to the bottom line, and that the stock
market will continue to reward these companies.

PORTFOLIO MANAGER PROFILES
John Ballen joined the MFS Research Department in 1984. A graduate of Harvard
College, the University of New South Wales in Australia and Stanford
University, he was named Investment Officer in 1986, Vice President -
Investments in 1987, Director of Research in 1988, Senior Vice President in
1990, Director of Equity Portfolio Management in 1993 and Chief Equity Officer
in 1995. He has managed MFS Emerging Growth Series since its inception in July
1995.

    Toni Shimura joined MFS in 1987 as a member of the Research Department. A
graduate of Wellesley College and the Sloan School of Management at the
Massachusetts Institute of Technology, she was named Investment Officer in
1990, Assistant Vice President -- Investments in 1991, and Vice President --
Investments in 1992. She has managed MFS Emerging Growth Series since November
1995.

PERFORMANCE SUMMARY
The information below illustrates the performance of MFS Emerging Growth
Series shares.

CUMULATIVE TOTAL RATES OF RETURN
                                                                   7/24/95* -
                                                      6 Months     6/30/96
- ------------------------------------------------------------------------------
Cumulative Total Return                                +15.07%      +35.11%
- ------------------------------------------------------------------------------
All results are historical and, therefore, are not an indication of future
results. The investment return and principal value of an investment in the
product will vary with changes in market conditions, and shares, when
redeemed, may be worth more or less than their original cost. All Series
results reflect the applicable expense subsidy which is explained in the Notes
to Financial Statements. Had the subsidy not been in effect, the results would
have been less favorable. No Series results reflect expenses that would be
imposed by insurance company separate accounts.

*Commencement of investment operations.

<PAGE>

PORTFOLIO OF INVESTMENTS - June 30, 1996

Stocks - 84.9%
- -----------------------------------------------------------------------------
Issuer                                                    Shares        Value
- -----------------------------------------------------------------------------
U.S. Stocks - 78.7%
  Advertising
    Outdoor System, Inc.*                                    100  $     3,525
- -----------------------------------------------------------------------------
  Apparel and Textiles - 0.9%
    Nine West Group, Inc.*                                 6,200  $   316,975
- -----------------------------------------------------------------------------
  Automotive - 0.1%
    APS Holding Corp., "A"*                                1,700  $    37,400
    Harvard Industries, Inc.*                              1,100       13,475
                                                                  -----------
                                                                  $    50,875
- -----------------------------------------------------------------------------
  Biotechnology - 0.2%
    Guidant Corp.                                          1,300  $    64,025
    Integra Lifesciences Corp.*                              300        2,925
                                                                  -----------
                                                                  $    66,950
- -----------------------------------------------------------------------------
  Business Machines - 1.5%
    Affiliated Computer Co.*                               8,800  $   413,600
    Sun Microsystems, Inc.*                                2,250      132,469
                                                                  -----------
                                                                  $   546,069
- -----------------------------------------------------------------------------
  Business Services - 13.8%
    ADT Ltd.*                                              6,500  $   122,687
    Accustaff, Inc.*                                      20,800      566,800
    BDM International, Inc.*                               1,600       74,400
    BISYS Group, Inc.*                                     1,900       71,725
    CUC International, Inc.*                              16,200      575,100
    Career Horizons, Inc.*                                 4,800      168,000
    Ceridian Corp.*                                       13,800      696,900
    Computer Sciences, Inc.*                               3,400      254,150
    Corestaff, Inc.*                                       3,150      140,963
    DST System, Inc.*                                      8,000      256,000
    Employee Solutions, Inc.*                             10,000      315,000
    Equity Corporation International *                     2,000       54,000
    First USA Paymentech, Inc.*                              100        4,000
    Global DirectMail Corp.*.                              1,300       51,350
    ICT Group, Inc.*                                         100        1,925
    Learning Tree International, Inc.*                    15,200      467,400
    Loewen Group, Inc.                                     5,900      178,475
    Reynolds & Reynolds Co., "A"                           2,700      143,775
    Technology Solutions Co.*                             26,000      900,250
    Transaction Systems Architects, Inc., "A"*             2,700      180,900
                                                                  -----------
                                                                  $ 5,223,800
- -----------------------------------------------------------------------------
  Chemicals - 0.3%
    Praxair, Inc.                                          2,500  $   105,625
- -----------------------------------------------------------------------------
  Computer Software - Personal Computers - 3.2%
    Autodesk, Inc.                                        12,585  $   375,977
    Electronic Arts, Inc.*                                   250        6,687
    First Data Corp.                                       7,100      566,058
    Microsoft Corp.*                                       1,925      231,316
    Spectrum Holobyte, Inc.*                               2,100       12,075
    Symantec Corp.*                                          300        3,750
                                                                  -----------
                                                                  $ 1,195,863
- -----------------------------------------------------------------------------
  Computer Software - Systems - 19.7%
    Adobe Systems, Inc.                                    5,000  $   179,375
    BMC Software, Inc.*                                   19,650    1,174,087
    Cadence Design Systems, Inc.*                         44,350    1,496,813
    Computer Associates International, Inc.               12,100      862,125
    Compuware Corp.*                                      16,200      639,275
    Control Data Systems, Inc.*                            5,100      109,012
    Edify Corp.*                                             100        2,650
    Forte Software, Inc.*                                    100        5,225
    Informix Corp.*                                        2,700       60,750
    Oracle Systems Corp.*                                 51,075    2,014,270
    Sapient Corp.*                                           100        4,225
    Sybase, Inc.*                                         22,450      530,381
    System Software Associates, Inc.                      18,100      307,700
    USCS International, Inc.*                              2,000       38,500
                                                                  -----------
                                                                  $ 7,424,388
- -----------------------------------------------------------------------------
  Construction Services - 0.5%
    Shaw Group, Inc.*                                     10,300  $   194,413
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 1.1%
    META Group, Inc.*                                        100  $     2,450
    Service Corp. International                            1,250       71,875
    Tyco International Ltd.                                8,700      354,525
                                                                  -----------
                                                                  $   428,850
- -----------------------------------------------------------------------------
  Electronics - 1.2%
    Altera Corp.*                                          5,200  $   197,600
    LSI Logic Corp.*                                       4,700      122,200
    Xilinx, Inc.*                                          4,100      130,175
                                                                  -----------
                                                                  $   449,975
- -----------------------------------------------------------------------------
  Entertainment - 5.3%
    American Radio Systems Corp.*                          3,300  $   141,900
    Bally Entertainment Corp.*                            10,000      275,000
    Grand Casinos, Inc.*                                  10,100      260,075
    Harrah's Entertainment, Inc.*                         19,100      539,575
    Heritage Media Corp., "A"*                             4,800      191,400
    Infinity Broadcasting Corp., "A"*                      1,950       58,500
    Jacor Communications, Inc.*                            5,400      166,725
    Lin Television Corp.*                                  4,000      144,000
    Showboat, Inc.                                           100        3,013
    Sinclair Broadcasting Group, Inc., "A" *               5,100      221,850
                                                                  -----------
                                                                  $ 2,002,038
- -----------------------------------------------------------------------------
  Machinery
    SI Handling Systems, Inc.                              1,200  $    12,300
- -----------------------------------------------------------------------------
  Medical and Health Products - 0.3%
    Cohr, Inc.*                                              100  $     2,375
    IDEC Pharmaceuticals Corp.*                            4,300       99,437
                                                                  -----------
                                                                  $   101,812
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 7.8%
    Columbia/HCA Healthcare Corp.                            400  $    21,350
    Community Health Systems*                              2,100      108,675
    Foundation Health Corp.*                                 700       25,113
    Health Management Assoc., Inc.*                        2,400  $    48,600
    Healthsource, Inc.*                                    8,800      154,700
    Healthsouth Corp.*                                    18,290      658,440
    IDX Systems Corp.*                                     2,500       97,500
    Orthodontic Centers of America, Inc.*                  2,100       55,650
    Oxford Health Plans, Inc.*                             1,500       61,687
    Pacificare Health Systems, Inc., "A"*                  1,000       66,000
    Pacificare Health Systems, Inc., "B"*                  5,900      399,725
    Pharmaceutical Product Development, Inc.*                100        3,350
    Renal Treatment Centers, Inc.*                         2,400       69,000
    Schein (Henry), Inc.*                                    100        3,825
    St. Jude Medical, Inc.*                                2,800       93,800
    Total Renal Care Holdings, Inc.*                         800       33,800
    United Healthcare Corp.                               20,500    1,036,599
                                                                  -----------
                                                                  $ 2,937,814
- -----------------------------------------------------------------------------
  Metals and Minerals - 0.1%
    Titanium Metals Corp.*                                 1,800  $    46,575
- -----------------------------------------------------------------------------
  Oils - 0.3%
    Seacor Holdings, Inc.*                                 2,900  $   129,775
- -----------------------------------------------------------------------------
  Pollution Control - 0.7%
    Republic Industries, Inc.*                               600  $    17,475
    Sanfill, Inc.*                                         4,900      241,325
                                                                  -----------
                                                                  $   258,800
- -----------------------------------------------------------------------------
  Printing and Publishing - 0.2%
    Pulitzer Publishing Co.                                1,200  $    71,100
- -----------------------------------------------------------------------------
  Railroads - 0.3%
    Wisconsin Central Transportation Corp.*                3,200  $   104,000
- -----------------------------------------------------------------------------
  Restaurants and Lodging - 8.0%
    Applebee's International, Inc.*                       22,900  $   735,662
    Buffets, Inc.*                                         1,200       14,700
    HFS, Inc.*                                            27,550    1,928,500
    Interstate Hotels Co.*                                   600       13,350
    Promus Hotel Corp.*                                    5,700      168,863
    Renaissance Hotel Group N.V.*                          7,500      159,375
                                                                  -----------
                                                                  $ 3,020,450
- -----------------------------------------------------------------------------
  Special Products and Services - 0.2%
    Yes+ Entertainment Corp.*                              3,800  $    56,050
- -----------------------------------------------------------------------------
  Stores - 3.0%
    BT Office Products International, Inc.*                1,700  $    30,387
    Corporate Express, Inc.*                               4,900      196,000
    General Nutrition Cos., Inc.*                         17,800      310,188
    Hollywood Entertainment Corp.*                         2,300       35,650
    Micro Warehouse, Inc.*                                   500       10,000
    Office Depot, Inc.*                                   22,300      454,362
    Officemax, Inc.*                                       4,500      107,438
                                                                  -----------
                                                                  $ 1,144,025
- -----------------------------------------------------------------------------
  Telecommunications - 10.0%
    Bay Networks, Inc.*                                      600  $    15,450
    Cabletron Systems, Inc.*                              17,450    1,197,506
    Cisco Systems, Inc.*                                  16,000      903,250
    ECI Telecommunications Limited Designs                 6,900      160,425
    Glenayre Technologies, Inc.*                          11,000      550,000
    Premiere Technologies, Inc.*                             100        3,150
    Sterling Commerce, Inc.*                                 800       29,700
    Tel-Save Holdings, Inc.*                               8,200      174,250
    Worldcom, Inc.*                                       13,600      752,575
                                                                  -----------
                                                                  $ 3,786,306
- -----------------------------------------------------------------------------
Total U.S. Stocks                                                 $29,678,353
- -----------------------------------------------------------------------------
Foreign Stocks - 6.2%
  Canada - 0.6%
    Biochem Pharma, Inc. (Medical and Health
      Products)*                                           4,750  $   178,125
    Loewen Group (Special Products and
      Services)##                                          1,900       57,475
                                                                  -----------
                                                                  $   235,600
- -----------------------------------------------------------------------------
  France
    Dassault Systems S.A., ADR (Computer
      Software)*                                             300  $     6,900
- -----------------------------------------------------------------------------
  Germany - 0.2%
    SGL Carbon AG, ADR (Metals and Minerals)*              2,300  $    87,975
- -----------------------------------------------------------------------------
  Hong Kong - 0.2%
    Asia Satellite Telecommunications Holdings
      Ltd., ADR (Telecommunications)*                        100  $     2,975
    Guangnan Holdings (Wholesale)                        109,000       65,128
                                                                  -----------
                                                                  $    68,103
- -----------------------------------------------------------------------------
  Ireland - 0.3%
    Elan Corp. PLC, ADR (Medical and Health
      Products)*                                           1,750  $    99,969
- -----------------------------------------------------------------------------
  Italy - 2.8%
    Fila Holdings S.p.A., ADR (Apparel and
      Textiles)                                            7,250  $   625,312
    Luxottica Group S.p.A., ADR (Consumer
      Goods and Services)                                  4,850      355,869
    Telecom Italia Mobile S.p.A.
      (Telecommunications)                                58,500       79,753
                                                                  -----------
                                                                  $ 1,060,934
- -----------------------------------------------------------------------------
  Netherlands - 0.6%
    Gucci Group N.V. (Apparel and Textiles)*               3,650  $   235,425
- -----------------------------------------------------------------------------
  Philippines - 0.4%
    Pilipino Telegraph & Telephone Corp.
      (Telecommunications)*                              104,200  $   159,093
- -----------------------------------------------------------------------------
  South Korea - 0.8%
    Korea Mobile Telecommunications, ADR
      (Telecommunications)*                               17,700  $   303,112
- -----------------------------------------------------------------------------
  United Kingdom - 0.3%
    Danka Business Systems PLC, ADR (Business
      Services)                                            2,600  $    74,750
    Jarvis Hotels PLC (Restaurants and
      Lodging)*+                                             700        1,880
    Pace Micro Technology PLC (Electronics)*               8,600       25,366
    Planning Sciences, International PLC, ADR
      (Computer Software - Systems)*                         100        2,250
                                                                  -----------
                                                                  $   104,246
- -----------------------------------------------------------------------------
Total Foreign Stocks                                              $ 2,361,357
- -----------------------------------------------------------------------------
Total Stocks (Identified Cost, $30,795,039)                       $32,039,710
- -----------------------------------------------------------------------------
Short-Term Obligations - 15.6%
- -----------------------------------------------------------------------------
                                                Principal Amount
Issuer                                             (000 Omitted)        Value
- -----------------------------------------------------------------------------
  Farm Credit Discount Note, due 7/11/96                  $1,100  $ 1,097,741
  Federal Home Loan Bank, due 7/12/96                      3,800    3,792,197
  Federal National Mortgage Assn., due 7/25/96             1,000      995,023
- -----------------------------------------------------------------------------
Total Short-Term Obligations, at Amortized Cost                   $ 5,884,961
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $36,680,000)                  $37,924,671
Other Assets, Less Liabilities - (0.5)%                              (190,603)
- -----------------------------------------------------------------------------
Net Assets - 100.0%                                               $37,734,068
- -----------------------------------------------------------------------------
 *Non-income producing security.
 +Restricted security.
##SEC Rule 144A restriction.

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- --------------------------------------------------------------------------------
June 30, 1996
- --------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $36,680,000)              $37,924,671 
  Cash                                                                   30,687 
  Receivable for investments sold                                       468,674 
  Receivable for Series shares sold                                     427,874 
  Interest and dividends receivable                                       7,718 
  Receivable from investment adviser                                     16,121 
  Deferred organization expenses                                          7,472 
  Other assets                                                               42 
                                                                    ----------- 
      Total assets                                                  $38,883,259 
                                                                    ----------- 
Liabilities:                                                                    
  Payable for investments purchased                                 $ 1,114,086 
  Payable for Series shares reacquired                                    9,160 
  Payable to affiliates -                                                       
    Management fee                                                        2,297 
    Shareholder servicing agent fee                                         130 
  Accrued expenses and other liabilities                                 23,518 
                                                                    ----------- 
      Total liabilities                                             $ 1,149,191 
                                                                    ----------- 
Net assets                                                          $37,734,068 
                                                                    =========== 
Net assets consist of:                                                          
  Paid-in capital                                                   $36,331,176 
  Unrealized appreciation on investments and translation of                     
    assets and liabilities in                                                   
    foreign currencies                                                1,244,645 
  Accumulated undistributed net realized gain on investments                    
    and foreign currency transactions                                   172,427 
  Accumulated undistributed net investment loss                         (14,180)
                                                                    ----------- 
      Total                                                         $37,734,068 
                                                                    =========== 
Shares of beneficial interest outstanding                             2,873,035 
                                                                    =========== 
Net asset value, offering price, and redemption price per share
    (net assets of $37,734,068 / 2,873,035 shares of beneficial
      interest outstanding)                                            $13.13
                                                                       ======

See notes to financial statements                                    

<PAGE>

FINANCIAL STATEMENTS - continued

Statement of Operations
- --------------------------------------------------------------------------------
Six Months Ended June 30, 1996
- --------------------------------------------------------------------------------
Net investment income:
  Income -
    Interest                                                         $   53,980 
    Dividends                                                             7,163 
    Foreign taxes withheld                                                 (369)
                                                                     ---------- 
        Total investment income                                      $   60,774 
                                                                     ---------- 
  Expenses -                                                                    
    Management fee                                                   $   56,216 
    Trustees' compensation                                                1,017 
    Shareholder servicing agent fee                                       2,657 
    Printing                                                             41,434 
    Auditing fees                                                        11,942 
    Custodian fee                                                         3,214 
    Amortization of organization expenses                                   916 
    Legal fees                                                              579 
    Miscellaneous                                                         1,305 
                                                                     ---------- 
      Total expenses                                                 $  119,280 
    Preliminary reduction of expenses by investment adviser             (43,458)
    Fees paid indirectly                                                   (868)
                                                                     ---------- 
      Net expenses                                                   $   74,954 
                                                                     ---------- 
        Net investment loss                                          $  (14,180)
                                                                     ---------- 
Realized and unrealized gain (loss) on investments:                             
  Realized gain (identified cost basis) -                                       
    Investment transactions                                          $  172,339 
    Foreign currency transactions                                            88 
                                                                     ---------- 
        Net realized gain on investments and foreign currency                   
          transactions                                               $  172,427 
                                                                     ---------- 
  Change in unrealized appreciation (depreciation) -                            
    Investments                                                      $1,070,952 
    Translation of assets and liabilities in foreign currencies             (26)
                                                                     ---------- 
        Net unrealized gain on investments and foreign currency                 
          translation                                                $1,070,926 
                                                                     ---------- 
          Net realized and unrealized gain on investments and                   
            foreign currency                                         $1,243,353 
                                                                     ---------- 
            Increase in net assets from operations                   $1,229,173 
                                                                     ========== 

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Statement of Changes in Net Assets
- --------------------------------------------------------------------------------
                                          Six Months Ended          Period Ended
                                             June 30, 1996    December 31, 1995*
- --------------------------------------------------------------------------------
Increase (decrease) in net assets:                                              
From operations -                                                               
  Net investment income (loss)               $    (14,180)           $      877 
  Net realized gain on investments and                                          
    foreign currency transactions                 172,427                81,576 
  Net unrealized gain on investments                                            
    and foreign currency translation            1,070,926               173,719 
                                              -----------            ---------- 
    Increase in net assets from                                                 
      operations                              $ 1,229,173            $  256,172 
                                              -----------            ---------- 
Distributions declared to shareholders -                                        
  From net investment income                  $                      $          
                                                    --                     (877)
  From net realized gain on investments                                         
    and foreign currency transactions               --                  (81,576)
  In excess of net investment income                --                     (283)
  Tax return of capital                             --                  (21,847)
                                              -----------            ---------- 
    Total distributions declared to
      shareholders                            $     --               $ (104,583)
                                              -----------            ---------- 
Series share (principal) transactions -                                         
  Net proceeds from sale of shares            $38,725,377            $5,564,342 
  Net asset value of shares issued to                                           
    shareholders in reinvestment of                                             
    distributions                                   --                  104,583 
  Cost of shares reacquired                    (6,089,112)           (1,960,484)
                                              -----------            ---------- 
    Increase in net assets from Series                                          
      share transactions                      $32,636,265            $3,708,441 
                                              -----------            ---------- 
      Total increase in net assets            $33,865,438            $3,860,030 
Net assets:                                                                     
  At beginning of period                        3,868,630                 8,600 
                                              -----------            ---------- 
  At end of period (including                                                   
    accumulated undistributed net                                               
    investment loss of $14,180 and $0,                                          
    respectively)                             $37,734,068            $3,868,630 
                                              ===========            ========== 
                                                              
*For the period from the commencement of investment operations, July 24, 1995
    to December 31, 1995.

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Financial Highlights
- --------------------------------------------------------------------------------
                                       Six Months Ended          Period Ended  
                                          June 30, 1996    December 31, 1995*  
- --------------------------------------------------------------------------------
Per share data (for a share
 outstanding throughout each period):
Net asset value -                                                              
 beginning of period                             $11.41                $10.00  
                                                 ------                ------  
Income from investment operations# -
  Net investment income (loss)(S)               $ (0.01)               $ 0.01  
  Net realized and unrealized gain on
   investments and foreign currency
   transactions                                    1.73                  1.74  
                                                 ------                ------  
      Total from investment operations           $ 1.72                $ 1.75  
                                                 ------                ------  
Less distributions                                                             
 declared to shareholders -
  From net investment income                     $ --                 $ (0.01) 
  From net realized gain on investments
   and foreign currency transactions               --                   (0.26) 
  Tax return of capital                            --                   (0.07) 
                                                 ------                ------  
      Total distributions declared
        to shareholders                          $ --                 $ (0.34) 
                                                 ------                ------  
Net asset value - end of period                  $13.13                $11.41  
                                                 ======                ======  
Total return                                     15.07%++              17.41%++
Ratios (to average net assets)
 /Supplemental data(S)
  Expenses                                        1.00%+                1.00%+ 
  Net investment income (loss)                  (0.19)%+                0.10%+ 
Portfolio turnover                                  29%                   73%  
Average commission rate###                      $0.0362                  --    
Net assets at end of period
 (000 omitted)                                  $37,734                $3,869  

  * For the period from the commencement of investment operations, July 24, 1995
    to December 31, 1995.
  + Annualized.
 ++ Not annualized.
  # Per share data is based on average shares outstanding.
### Average commission rate is calculated for funds with fiscal years beginning
    on or after September 1, 1995.
(S) The Adviser voluntarily agreed to maintain the expenses of the Series at not
    more than 1.00% of average daily net assets. To the extent actual expenses
    were over these limitations, the net investment loss per share and the
    ratios would have been:
    Net investment loss                         $(0.04)                $(0.18)
    Ratios (to average net assets):
      Expenses                                   1.59%+                  2.91%+
      Net investment loss                      (0.78)%+                (1.78)%+

See notes to financial statements

<PAGE>

NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Emerging Growth Series (the Series) is a diversified series of MFS
Variable Insurance Trust (the Trust) which is comprised of the following
twelve series: MFS Bond Series, MFS Emerging Growth Series, MFS Growth Series,
MFS Growth with Income Series, MFS High Income Series, MFS Limited Maturity
Series, MFS Money Market Series, MFS Research Series, MFS Strategic Fixed
Income Series, MFS Total Return Series, MFS Utilities Series and MFS World
Governments Series. The Trust is organized as a Massachusetts business trust
and is registered under the Investment Company Act of 1940, as amended, as an
open-end management investment company.

The shareholders of each Series of the Trust are separate accounts of
insurance companies which offer variable annuity and/or life insurance
products. As of June 30, 1996 there were 21 shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
Investments in foreign securities are vulnerable to the effects of changes in
the relative values of the local currency and the U.S. dollar and to the
effects of changes in each country's legal, political, and economic
environment.

Investment Valuations - Equity securities listed on securities exchanges or
reported through the NASDAQ system are valued at last sale prices. Unlisted
equity securities or listed equity securities for which last sale prices are
not available are valued at last quoted bid prices. Short-term obligations,
which mature in 60 days or less, are valued at amortized cost, which
approximates market value. Securities for which there are no such quotations
or valuations are valued at fair value as determined in good faith by or at
the direction of the Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases
and sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates
of such transactions. Gains and losses attributable to foreign currency
exchange rates on sales of securities are recorded for financial statement
purposes as net realized gains and losses on investments. Gains and losses
attributable to foreign exchange rate movements on income and expenses are
recorded for financial statement purposes as foreign currency transaction
gains and losses. That portion of both realized and unrealized gains and
losses on investments that results from fluctuations in foreign currency
exchange rates is not separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection
with its organization have been deferred and are being amortized on a
straight-line basis over a five-year period beginning on the date of
commencement of operations of the Series.

Forward Foreign Currency Exchange Contracts - The Series may enter into
forward foreign currency exchange contracts for the purchase or sale of a
specific foreign currency at a fixed price on a future date. Risks may arise
upon entering into these contracts from the potential inability of
counterparties to meet the terms of their contracts and from unanticipated
movements in the value of a foreign currency relative to the U.S. dollar. The
Series will enter into forward contracts for hedging purposes as well as for
non-hedging purposes. For hedging purposes, the Series may enter into
contracts to deliver or receive foreign currency it will receive from or
require for its normal investment activities. It may also use contracts in a
manner intended to protect foreign currency-denominated securities from
declines in value due to unfavorable exchange rate movements. For non-hedging
purposes, the Series may enter into contracts with the intent of changing the
relative exposure of the Series' portfolio of securities to different
currencies to take advantage of anticipated changes. The forward foreign
currency exchange contracts are adjusted by the daily exchange rate of the
underlying currency and any gains or losses are recorded for financial
statement purposes as unrealized until the contract settlement date.

Investment Transactions and Income - Investment transactions are recorded on
the trade date. Interest income is recorded on the accrual basis. All premium
and original issue discount are amortized or accreted for financial statement
and tax reporting purposes as required by federal income tax regulations.
Dividend income is recorded on the ex-dividend date for dividends received in
cash. Dividend payments received in additional securities are recorded on the
ex-dividend date in an amount equal to the value of the security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with
the custodian and with the dividend disbursing agent. This amount is shown as
a reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of
net investment income and net realized gain reported on these financial
statements may differ from that reported on the Series' tax return and,
consequently, the character of distributions to shareholders reported in the
financial highlights may differ from that reported to shareholders on Form
1099-DIV. Foreign taxes have been provided for on interest and dividend income
earned on foreign investments in accordance with the applicable country's tax
rates and to the extent unrecoverable are recorded as a reduction of
investment income. Distributions to shareholders are recorded on the ex-
dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return
of capital. Differences in the recognition or classification of income between
the financial statements and tax earnings and profits which result in
temporary over-distributions for financial statement purposes, are classified
as distributions in excess of net investment income or accumulated net
realized gains.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an effective annual rate
of 0.75% of average daily net assets. Under a temporary expense reimbursement
agreement with MFS, MFS has voluntarily agreed to pay the Series' operating
expenses such that the total operating expenses of the Series shall not exceed
1.00% of its average daily net assets. The Series in turn will pay MFS an
expense reimbursement fee not greater than 1.00% of the Series' average daily
net assets. To the extent that the expense reimbursement fee exceeds the
Series' actual expenses, the excess will be applied to amounts paid by MFS in
prior years. At June 30, 1996, the aggregate unreimbursed expenses owed to MFS
by the Series amounted to $59,117, including $43,458 incurred during the
current period.

The Series pays no compensation directly to its Trustees who are officers of
the investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain of the
officers and Trustees of the Series are officers or directors of MFS and MFS
Service Center, Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as
a percentage of the average daily net assets at an effective annual rate of up
to 0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than U.S. government securities,
purchased option transactions and short-term obligations, aggregated
$32,168,035 and $4,733,539, respectively.

The cost and unrealized appreciation or depreciation in value of the
investments owned by the Series, as computed on a federal income tax basis,
are as follows:

Aggregate cost                                                   $36,680,000
                                                                 ===========
Gross unrealized appreciation                                    $ 2,499,686
Gross unrealized depreciation                                     (1,255,015)
                                                                 -----------
  Net unrealized appreciation                                    $ 1,244,671
                                                                 ===========

(5) Shares of Beneficial Interest
The Declaration of Trust permits the Trustees to issue an unlimited number of
full and fractional shares of beneficial interest (without par value).
Transactions in Series shares were as follows:

                         Period Ended                     Period Ended          
                         June 30, 1996                    December 31, 1995*    
                         --------------------------       --------------------- 
                            Shares           Amount       Shares         Amount 
- ------------------------------------------------------------------------------- 
Shares sold              3,020,841      $38,725,377      501,081   $  5,564,342 
Shares issued to
 shareholders in
 reinvestment of
 distributions               --                --          9,255        104,583 
Shares reacquired         (486,828)      (6,089,112)    (172,174)    (1,960,484)
                         ---------      -----------     --------   ------------ 
  Net increase           2,534,013      $32,636,265      338,162   $  3,708,441 
                         =========      ===========      =======   ============ 

*For the period from commencement of investment operations, July 24, 1995 to
December 31, 1995.

(6) Line of Credit
The Series entered into an agreement which enables it to participate with
other funds managed by MFS in an unsecured line of credit with a bank which
permits borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to
each fund, based on its borrowings, at a rate equal to the bank's base rate.
In addition, a commitment fee, based on the average daily unused portion of
the line of credit, is allocated among the participating funds at the end of
each quarter. The commitment fee allocated to the Series for the period ended
June 30, 1996 was $64.

(7) Restricted Securities
The Series may invest not more than 15% of its net assets in securities which
are subject to legal or contractual restrictions on resale. At June 30, 1996,
the Series owned the following restricted securities (constituting 0.01% of
net assets) which may not be publicly sold without registration under the
Securities Act of 1933. The Series does not have the right to demand that such
securities be registered. The value of these securities is determined by
valuations supplied by a pricing service or brokers or, if not available, in
good faith by or at the direction of the Trustees.

                                Date of
Description                  Acquisition         Shares        Cost       Value
- ------------------------------------------------------------------------------
Jarvis Hotels PLC               6/21/96            700      $1,882      $1,880
                                                                        ======

<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS
Emerging Growth Series:

We have audited the accompanying statement of assets and liabilities,
including the portfolio of investments, of MFS Emerging Growth Series (the
Series) (one of the series constituting MFS Variable Insurance Trust) as of
June 30, 1996, the related statement of operations for the six months then
ended, and the statements of changes in net assets and financial highlights
for the six months then ended and the period from July 24, 1995 (commencement
of investment operations) to December 31, 1995. These financial statements and
financial highlights are the responsibility of the Series' management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of the
securities owned at June 30, 1996 by correspondence with the custodian and
brokers; where replies were not received from brokers, we performed other
auditing procedures. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Emerging
Growth Series at June 30, 1996, the results of its operations, the changes in
its net assets, and its financial highlights for the respective stated periods
in conformity with generally accepted accounting principles.


DELOITTE & TOUCHE LLP

Boston, Massachusetts
August 2, 1996



                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.

<PAGE>


























































                                                             VEG-3-8/96/17.25M





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