Bond Index Fund

Bond Index

Northern Funds Center by E-mail

Louis D'Arienzo

With Northern Trust since 2003
Began Career in 1981

View all holdings as of
July 31, 2010

View all holdings as of
June 30, 2010

View all holdings as of
May 31, 2010

View all holdings as of
April 30, 2010

View all holdings as of
March 31, 2010

View all holdings as of
February 28, 2010

Fact Sheet

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This Fund is a good choice for those long-term, income-oriented investors who are looking to diversify their investments by gaining a broad exposure to the U.S. bond market. It offers a diversified portfolio of bond securities approximately the Barclays Capital U.S. Aggregate Bond Index. Investors will gain a broad exposure to the U.S. Treasury, government agency, investment grade corporate bond, mortgage - and asset-backed sectors of the fixed income markets.

Fund Objective: Seeks to Replicate Index

Ticker Symbol	Distribution Rate Daily as of 09/09/10	30 Day SEC Yield Monthly as of July 31, 2010
NOBOX	3.03%	2.60%

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Updated Daily as of September 9, 2010
Symbol	NOBOX	Distribution Rate*	3.03%
CUSIP	665162533	Tax-Equivalent Distribution Rate*	N/A
Share Price	$ 10.75	Updated Monthly as of July 31, 2010
Share Price Change	$ -0.04	Total Net Assets	$1,923,679,997
YTD Total Return	6.71%	Updated Monthly as of July 31, 2010
Inception Date	2/27/2007	30-Day SEC Yield*	2.60%
		Tax-Equivalent 30-Day SEC Yield*	N/A

Total Returns for Month Ended July 31, 2010
	Bond Index Fund	Barclays Capital U.S. Aggregate Bond Index	Morningstar Intermediate-Term Bond Category Average
Month	1.03%	1.07%	1.39%
3-Month	3.63%	3.52%	2.77%
Year to Date	6.35%	6.46%	6.67%
1 Year	8.27%	8.91%	11.52%
3-Year Avg. Annual	7.36%	7.63%	6.48%
Avg. Annual Since Inception	6.43%	6.93%	N/A

Total Returns for Quarter Ended June 30, 2010
	Bond Index Fund	Barclays Capital U.S. Aggregate Bond Index	Morningstar Intermediate-Term Bond Category Average
Month	1.61%	1.57%	1.42%
3-Month	3.56%	3.49%	2.71%
Year to Date	5.26%	5.33%	5.21%
1 Year	8.87%	9.50%	13.11%
3-Year Avg. Annual	7.33%	7.54%	6.03%
Avg. Annual Since Inception	6.27%	6.54%	N/A

Performance quoted represents past performance and does not guarantee future results. Investment return and principal value will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than that shown here.

The Advisor has agreed to reimburse certain expenses of the Fund. The contractual reimbursement arrangement is expected to continue until at least July 31, 2011. After this date, the contractual arrangements may be terminated if it is determined to be in the best interest of the Fund and its shareholders. In the absence of fee waivers, yield, total return, growth since inception and dividends would have been reduced. Total return is based on net change in NAV assuming reinvestment of distributions. The 30-day SEC yield more closely reflects the current earnings of the Fund than the total returns.

Disclosure

	Gross Expense Ratio	Net Expense Ratio*
Bond Index (NOBOX)	0.43%	0.25%
*Includes contractual expense reimbursements that, if not extended, will end on July 31, 2011.

	2009	2008
Bond Index	4.60%	5.82%
Barclays Capital U.S. Aggregate Bond Index	5.93%	5.24%
Morningstar Category Avg. Intermediate-Term Bond	13.97%	-4.70%
Performance quoted represents past performance and does not guarantee future results.

as of July 31, 2010

Read the most recent Fund Commentary (as of June 30, 2010)

Number of Holdings	1746
Average Duration†	4.1 YRS
Average Maturity	6.2 YRS
Weighted Average Coupon	4.45%
Income**	$0.0307
Dividend Schedule	Monthly
Dividend Income Last Quarter	$0.0897
Capital Gain Income Last Quarter	N/A
Benchmark	Barclays Capital U.S. Aggregate Bond Index
Morningstar Category	Intermediate-Term Bond

Maturity Distribution		Fund
0 - 1 Year		4.5%
1 - 2 Years		8.7%
2 - 3 Years		21.0%
3 - 5 Years		27.8%
5 - 7 Years		15.0%
7 - 10 Years		12.6%
10 - 20 Years		2.7%
20 - 30 Years		7.5%
30+ Years		0.2%
TOTAL		100.0%

Quality Distribution	Fund	Benchmark
AAA	79.2%	78.2%
AA	4.2%	4.3%
A	9.7%	9.5%
BAA	6.9%	8.0%
TOTAL	100.0%	100.0%

Sector Weightings	Fund	Benchmark
Mortgage-Backed	33.5%	33.7%
Treasury	32.5%	32.5%
Industrials	9.6%	9.7%
Agency	7.8%	7.6%
Financials	6.1%	6.5%
Commercial MBS	3.1%	3.0%
Utilities	2.2%	2.1%
Foreign Agencies	1.2%	1.2%
Supranational	1.1%	1.2%
Sovereign	1.0%	1.1%
Local Authority	0.9%	1.1%
Short-Term	0.6%	0.0%
Asset-Backed	0.4%	0.3%
TOTAL	100.0%	100.0%

All data is as of date indicated and subject to change.

Bond Risk: 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.

Mortgage-Backed Securities Risk: Mortgage-backed investments involve risk of loss due to prepayments and, like any bond, due to default. Because of the sensitivity of mortgage-related securities to changes in interest rates, the Fund’s performance may be more volatile than if it did not hold these securities.

Index Fund Risk: The performance of the Fund is expected to be lower than that of the Index because of Fund fees and expenses. It is important to remember that there are risks associated with index investing, including the potential risk of market decline, as well as the risks associated with investing in specific companies.

Barclays Capital U.S. Aggregate Bond Index is an unmanaged index of prices of U.S. dollar-denominated investment-grade fixed income securities with remaining maturities of one year and longer. It is not possible to invest directly in an index.

Quality Distribution: Credit quality ratings primarily originate from data compiled by Barclays Capital within their POINT model. They are based on the conservative average of Moody's, Standard & Poor's, and Fitch ratings. If ratings from all three rating agencies disagree, the model assigns the middle rating to the security. If two of the three agree, the model assigns the rating from those two to the security. If none of these three rating agencies has assigned a rating the Fund will assign a rating of NR (non-rated security). The ratings represent the rating agencies' opinions of the quality of the securities they rate. The ratings, expressed in Moody's nomenclature, range from Aaa ("judged to be of the highest quality, with minimal credit risk") to C ("the lowest rated class of bonds, typically in default, with little prospect for recovery of principal or interest"). Ratings are relative and subjective and are not absolute standards of quality.