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<PAGE>
JULY 15, 1997
US Government Securities Fund
Supplement to Statement of Additional Information Dated February 28, 1997
The following replaces average annual return figures in the section of
the Statement of Additional Information entitled Average Annual Total Return
under Calculation of Performance Data:
Average Annual Total Return
US Government Securities Fund
<TABLE>
<CAPTION>
Class B Class B Class C Class C
Class A Class A Shares Shares Shares Shares
Shares Shares (including (excluding (including (excluding
(at offer) (at NAV) CDSC) CDSC) CDSC) CDSC)
<S> <C> <C> <C> <C> <C> <C> <C> <C>
1 year 1 year 1 year
ended ended ended
10/31/96 (0.21%) 4.73% 10/31/96 0.12% 4.07% 10/31/96 2.97% 3.96%
Period Period
3 years 6/7/94(1) 1/10/95
ended through through
10/31/96 2.77% 4.44% 10/31/96 6.01%(2) 7.16%(2) 10/31/96 11.07%(2) 11.07%(2)
5 years
ended
10/31/96 6.51%(2) 7.56%(2)
Period
11/2/87(1)
through
10/31/96 8.40%(2) 8.99%(2)
Institutional
Class
1 year
ended
10/31/96 4.73% 4.73%
Period
6/7/94
through
10/31/96 7.80% 7.80%
</TABLE>
(1) Date of initial public offering.
(2) Reflects voluntary waivers in effect during the period(s).
<PAGE>
The following replaces cumulative total return figures in the section
of the Statement of Additional Information entitled Cumulative Total Return
under Calculation of Performance Data:
Cumulative Total Return
US Government Securities Fund
<TABLE>
<CAPTION>
Class B Class B Class C Class C
Class A Shares Shares Shares Shares
Shares (including (excluding (including (excluding Institutional
(at offer) CDSC) CDSC) CDSC) CDSC) Class
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C>
3 months 3 months 3 months 3 months
ended ended ended ended
10/31/96 (1.11%) 10/31/96 (0.33%) 3.67% 10/31/96 2.67% 3.67% 10/31/96 3.87%
6 months 6 months 6 months 6 months
ended ended ended ended
10/31/96 0.17% 10/31/96 0.81% 4.81% 10/31/96 3.82% 4.82% 10/31/96 5.09%
9 months 9 months 9 months 9 months
ended ended ended ended
10/31/96 (3.91%) 10/31/96 (3.45%) 0.41% 10/31/96 (0.62%) 0.35% 10/31/96 0.92%
1 year 1 year 1 year 1 year
ended ended ended ended
10/31/96 (0.21%) 10/31/96 0.12% 4.07% 10/31/96 2.97% 3.96% 10/31/96 4.73%
Period Period Period
3 years 6/7/94(1) 1/10/95(1) 6/7/94(1)
ended through through through
10/31/96 8.55% 10/31/96 15.07%(2) 18.07%(2) 10/31/96 20.91%(2) 20.91%(2) 10/31/96 19.78%
5 years
ended
10/31/96 37.10%(2)
Period
11/2/87(1)
through
10/31/96 106.60%(2)
</TABLE>
(1) Date of initial public offering.
(2) Reflects voluntary waivers in effect during the period(s).
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