Investment Grade Tax-Exempt Bond

Fund Resources

Class	CUSIP	Ticker
A	76628T835	SISIX
C	76628T827	SCITX
I	76628T843	STTBX

Past performance does not guarantee future results. The performance data quoted represents past performance and current returns may be lower or higher. The investment return and net asset value will fluctuate so that an investor's shares, when redeemed may be worth more or less than the original cost.

Investment performance may reflect voluntary fee waivers which may be discontinue at any time. Without these fee waivers performance would have been lower.

Bond Funds will tend to experience smaller fluctuations in value than stock funds. However, investors in any bond fund should anticipate fluctuations in price, especially for longer-term issues and in environments of rising interest rates.

Daily as of 11/18/08

Class	CUSIP	Ticker	Inception	NAV	POP	NAV Change
A	76628T835	SISIX	6/9/1992	11.34	11.91	0.03
C	76628T827	SCITX	6/1/1992	11.32	11.32	0.02
I	76628T843	STTBX	10/21/1993	11.32	11.32	0.02
A tax-exempt fund income may be subject to certain state and local taxes and, depending on your tax status, the federal alternative minimum tax.

Monthly as of 10/31/08

Class	CUSIP	Ticker	Inception		MTD (%)	QTD (%)	YTD (%)	1 Year (%)	3 Years (%)	5 Years (%)	10 Years (%)	Since Inception (%)
A	76628T835	SISIX	6/9/1992	POP NAV	0.02 -4.75	-2.85 -7.49	-1.23 -5.94	0.30 -4.45	2.44 0.79	2.49 1.50	3.99 3.49	5.49 5.17
C	76628T827	SCITX	6/1/1992	POP NAV	-0.03 -1.03	-3.02 -3.99	-1.80 -2.77	-0.49 -1.46	1.73 1.73	1.86 1.86	3.43 3.43	4.18 4.18
I	76628T843	STTBX	10/21/1993	POP NAV	0.05	-2.78	-0.89	0.60	2.75	2.85	4.39	5.18
A tax-exempt fund income may be subject to certain state and local taxes and, depending on your tax status, the federal alternative minimum tax.

Quarterly as of 9/30/08

Class	CUSIP	Ticker	Inception		YTD (%)	1 Year (%)	3 Years (%)	5 Years (%)	10 Years (%)	Since Inception (%)	Gross Expense Ratio (%)	Net Expense Ratio (%)
A	76628T835	SISIX	6/9/1992	POP NAV	-1.25 -5.96	0.53 -4.22	2.24 0.58	2.36 1.38	3.99 3.49	5.51 5.20	0.86	0.86
C	76628T827	SCITX	6/1/1992	POP NAV	-1.77 -2.74	-0.17 -1.14	1.53 1.53	1.73 1.73	3.42 3.42	4.21 4.21	1.56	1.56
I	76628T843	STTBX	10/21/1993	POP NAV	-0.94	0.83	2.57	2.72	4.38	5.21	0.56	0.56
A tax-exempt fund income may be subject to certain state and local taxes and, depending on your tax status, the federal alternative minimum tax.

Class A Shares have a maximum sales charge imposed on purchases (as a percentage of offering price) of 4.75%. This sales charge varies depending upon how much you invest. You may buy A Shares in amounts of $1,000,000 or more at net asset value (without an initial sales charge), but if you redeem those shares within one year of your purchase, you will pay a deferred sales charge of 1.00%.
Class C purchased on or after August 1, 2005, have a 1% sales charge imposed if you sell within one year of your purchase. A 2% sales charge is imposed if you sell C Shares purchased before August 1, 2005 within one year of your purchase.
A 1% sales charge is imposed if you sell C Shares purchased on or after August 1, 2005 within one year of your purchase. A 2% sales charge is imposed if you sell C Shares purchased before August 1, 2005 within one year of your purchase.
I Shares have no sales charge.
All Share Classes have a redemption fee (as a percentage of net asset value) of 2.00%. This redemption fee will be imposed on shares redeemed within seven days of purchase unless the redemption is excluded under the Redemption Fee Policy.
POP (Public Offering Price) – The price at which a new securities offering is made available to the public.
NAV (Net Asset Value) – The dollar value of a single mutual fund share, based on the value of the underlying assets of the fund minus its liabilities, divided by the number of shares outstanding. Calculated at the end of each business day.