Nuveen Senior Income Fund (NYSE: NSL)
FACT SHEET AS OF 07/30/2010, UNLESS OTHERWISE INDICATED
OBJECTIVE & INVESTMENT STRATEGY

The fund's investment objective is to achieve a high level of current income, consistent with capital preservation by investing primarily in adjustable rate U.S dollar-denominated secured Senior Loans.

The fund invests 80% of its total assets in adjustable rate senior secured loans. The fund may invest up to 20% of its total assets in U.S. dollar denominated senior loans of non-U.S. borrowers, senior loans that are not secured, other debt securities, and equity securities and warrants acquired in connection with the fund's investment in senior loans. The fund uses leverage.

DISTRIBUTION HISTORY
KEY INFORMATION REGARDING DISTRIBUTIONS
Current Distribution (Monthly) (As of 10/1/2010)$0.0410
Avg. Earnings/Share** ( As of 7/31/2010)$0.0313
Avg. Earnings/Distribution Ratio ( As of 7/31/2010)76.34%
Avg. UNII Per Share ( As of 7/31/2010)-$0.0200
Total % of Portfolio Leveraged (As of 7/30/2010)26.68%
Average Cost of Leverage(13 weeks) (As of 7/30/2010)0.42%
HIGHLIGHTS

Provides potential for:

  • High monthly income
  • Adjustable dividends that can act as a possible hedge against rising short-term interest rates
  • Diversification for your overall income portfolio
PRICING & DISTRIBUTION
Closing Share Price (As of 9/1/2010)$7.17
Closing NAV per Share (As of 9/1/2010)$6.75
Premium / Discount6.22%
Current Distribution Rate (Market price)††6.86%
Distribution Amount (Monthly) $0.0410
CAPITAL STRUCTURE
Total Managed Assets $277,174,709
Common Shares 
Total Common Net Assets$203,224,709
Shares Outstanding29,846,884
Avg Daily Volume (in shares)73,762
 DollarPercent
Total Structural Leverage$73,950,00026.68%
Effective Leverage$73,950,00026.68%
Asset Coverage 1More Information 
FUND BASICS
CUSIP67067Y104
NAV TickerXNSLX
Inception Date10/26/1999
Inception NAV$9.55
Inception Share Price$10.00
FUND CHARACTERISTICS
# of Holdings 201
% Foreign Holdings ‡1.37%
% Large, Mid, Small Cap †0.0%,0.0%,100.0%
SHARE PRICE AND NAV HISTORY
Data reflects performance over the previous 12 months
ASSET ALLOCATION
CALENDAR YEAR TOTAL RETURNS
Share Price 5.69% 138.50% -48.88% -8.89% 18.57% -11.83% 6.95% 37.69% 2.12% -16.64%
NAV 7.64% 111.95% -52.48% 0.55% 8.55% 5.49% 11.97% 21.70% 4.33% -7.10%

ANNUALIZED TOTAL RETURNS
Share Price 48.08% 7.12% 4.80% 5.14% 5.38%
NAV 23.58% 2.99% 3.75% 5.04% 5.22%
FUND MANAGER

Founded in 1994 by a team of industry veterans known for their pioneering work in quantitative analysis, Symphony Asset Management LLC is an institutional market leader in alternative and traditional investment strategies. Fundamental to Symphony’s investment philosophy is the concept that both quantitative and qualitative methods have value. The ability to blend these values into a unified, risk-controlled investment process is a skill that sets Symphony apart as an institutional money manager. Prior to implementation, each of our strategies has been thoroughly tested in one of the industry’s most sophisticated research environments. The resulting process is intellectually robust and independent of any one person’s influence or abilities.

ANNUAL EXPENSE RATIOS
 Total FundCommon Shares
Management Fees0.82%1.12%
Interest Expenses0.09%0.12%
Other Expenses0.68%0.93%
Total1.59%2.17%
See the fund's Annual Report for full information on expenses.
TOP ISSUERS
IssuerDollar Value% of Total Portfolio
Building Materials: Debt$5,771,4162.01%
Infor Global: Debt$5,639,1661.97%
Charter Communicati: Debt$5,650,4131.96%
Swift Transportatio: Debt$5,577,0951.94%
Federal Mogul Corpo: Debt$5,158,4901.80%
Avaya Incorporated: Debt$5,016,4241.75%
Ford Motor Company: Taxable Debt$4,788,6041.67%
Las Vegas Sands Cor: Debt$4,634,4881.61%
Univision Communica: Debt$4,567,5021.59%
Spectrum Brands Inc: Debt$4,472,5531.56%

Data shown represents past performance and is no guarantee of future results. Market price and net asset value (NAV) of a Fund's shares will fluctuate with market conditions. Current performance may be higher or lower than the performance shown.

RISKS
Credit riskThe risk that a security in the fund's portfolio will decline in price, or fail to make dividend or interest payments when due, because the security's issuer defaults or experiences a decline in its financial status. Securities falling lower in a company's capital structure and/or unrated securities and securities with lower credit ratings are expected to have higher credit risk. See subordination. Risks from Unsecured Adjustable Rate Loans or Insufficient Collateral Securing Adjustable Rate LoansSome of the adjustable rate loans in which the fund may invest will be unsecured, thereby increasing the risk of loss to the fund in the event of Issuer default. Other adjustable rate loans may be secured by specific collateral, but there can be no assurance that liquidating this collateral would satisfy a borrower's obligation to the fund in the event of borrower default, or that such collateral could be readily liquidated under such circumstances. Non-Investment Grade or Below-Investment Grade Securities RiskInvestments in, or related to, obligors of below investment grade quality, are commonly referred to as "junk bonds". These investments are predominantly speculative with respect to the issuer's capacity to pay interest and repay principal when due and therefore involve a greater risk of default or decline in market value due to adverse economic and issuer-specific developments. Such investments may be less liquid than investment grade securities. Unrated Investment RiskIn determining whether an unrated security is an appropriate investment for the fund, the manager will seek to determine whether the default probability and financial strength characteristics of the security are comparable to those of issuers of securities rated investment grade quality. The manager will consider information from industry sources, as well as its own quantitative and qualitative analysis, in making such a determination. However, such a determination by the manager is not the equivalent of an investment grade rating by a rating agency. Illiquid Securities RiskIlliquid securities involve the risk that the securities will not be able to be sold at the time or prices desired by the fund. Illiquid securities are not readily marketable and may include some restricted securities that may be resold to qualified institutional buyers in private transactions but otherwise would not have a regular secondary trading market. Senior Loan Risk Senior loans in which the fund may invest, both secured and unsecured, may not be rated by a national rating agency at the time of investment, generally will not be registered with the Securities and Exchange Commission and generally will not be listed on a securities exchange. In addition, the amount of public information available with respect to senior loans generally is less extensive than that available for more widely rated, registered and exchange-listed securities. Because the interest rates of senior loans reset frequently, if market interest rates fall, the loans' interest rates will be reset to lower levels, potentially reducing the fund's income.
NOTES

1 The ratio of a fund's total managed assets to the sum of (the fund's outstanding preferred shares, at par, plus its outstanding borrowings).

Holdings and their ratings may change over time. Ratings shown are generally the highest rating given by one or more national rating agencies. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC/CC/C and D are below-investment grade ratings. Holdings designated “NR” are not rated by a national rating agency, and may be assigned an internal rating by the fund’s investment adviser.

* For the 98.15% of the portfolio invested in debt securities.

**The average earnings per share and UNII figures are monthly amounts based on three month averages for the municipal funds and senior loan funds and six month averages for all other taxable funds. For JRS and 25% of JDD, the average earnings per share represents net REIT cash flow which may consist of income, capital gains and/or a return of capital.

† Percentage are relative to the 1.84% of the portfolio invested in equity securities.

†† Distribution rates represent the latest declared regular distribution, annualized, relative to the most recent daily market price and NAV.

‡ Relative to the fund's total managed assets.

Total return is determined by subtracting the initial investment from the redeemable value of the investment at the end of the investment period, dividing the remainder by the initial investment and expressing the result as a percentage. The calculation assumes that all fund distributions have been reinvested.