Lipper Award 2008
The Fund (class I) was awarded the 2008 Lipper Fund Award for Consistent Return, among 510 Mixed-Asset Target Allocation Growth funds for the three-year period ended 12/31/07.
Like Icing on the Cake Thornburg Investment Income Buidler Fund 5 Year Anniversary
5 Years of Cultivating the growth of the dividend
The fund primarily focuses on finding companies that are willing and able to pay dividends and to increase those dividends over time.
While many funds seek total return soley through capital appreciation, Thornburg Investment Income Builder Fund aims to provide the icing on the cake with growing dividend income.
Ticker Symbols: A shares TIBAX, C shares TIBCX, I shares TIBIX, R1 shares TIBRX, R5 shares TIBMX Historical Dividend Chart
4 star overall Morningstar Rating among 84 funds in the world allocation category for the 3-year period ending 11/30/07
Call your Inside Sales Partner at 877-215-1330 for more information View Standardized Performance and SEC Yields visit thornburg.com/iib
This communication is not authorized for distribution to prospective investors in the Fund unless preceded or accompanied by an effective prospectus.
 
Related Information for Thornburg Investment Income Builder Fund
Fund Highlight Growing Dividends Research Report
Fund Holdings Commentary Request Literature
Portfolio Manager Market Commentary Prospectus
Important Information

Investments in the Fund carry risks including possible loss of principal. Investing outside the United States involves additional risks, such as currency fluctuations. Additionally, the Fund invests a portion of the assets in small capitalization companies which may increase the risk of greater price fluctuations.

As with direct bond ownership, Funds that invest in bonds are subject to certain risks including interest-rate risk, credit risk, and inflation risk.  The value of a bond will fluctuate relative to changes in interest rates; as interest rates rise, the overall price of bonds fall. Investments in the Fund are not FDIC insured, nor are they deposits of or guaranteed by a bank or any other entity.

There is no guarantee that the Fund will meet its investment objectives.

Carefully consider the Fund’s investment objectives, risks, sales charges, and expenses; these are found in the prospectus, which is available from your financial advisor or from our download library. Read it carefully before you invest or send money.

Lipper Fund Awards are granted annually to the fund in each Lipper classification that consistently delivered the strongest risk-adjusted performance (calculated with dividends reinvested and without sales charges). Awards are given for three-year, five-year, and ten-year periods. The fund did not win the award for other time periods. Past performance does not guarantee future results.

© 2001-2008 Morningstar, Inc. All Rights Reserved. The information contained herein: (1) is proprietary to Morningstar; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information. Past performance is no guarantee of future results. For each fund with at least a three-year history, Morningstar calculates a Morningstar Rating™ based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a fund's monthly performance (including the effects of sales charges, loads, and redemption fees), placing more emphasis on downward variations and rewarding consistent performance. The top 10% of funds in each category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars and the bottom 10% receive 1 star. (Each share class is counted as a fraction of one fund within this scale and rated separately, which may cause slight variations in the distribution percentages.) The Overall Morningstar Rating for a fund is derived from a weighted-average of the performance figures associated with its three-, five- and ten-year (if applicable) Morningstar Rating metrics. Thornburg Investment Income Builder Fund was rated against the following number of U.S.-domiciled world allocation funds over the following time periods: 97 funds in the last three years and 79 funds in the last five years. With respect to these world allocation funds, Thornburg Investment Income Builder Fund received a Morningstar Rating of four stars and four stars for the 3- and 5-year periods respectively. Morningstar Rating is for the A share class only; other classes may have different performance characteristics.

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