The performance data quoted represents past performance and does not guarantee future results. Current performance may be lower or higher. Click here to obtain the most recent month-end performance. Investment return and principal value of the fund will fluctuate, and shares may be worth more or less than their original cost when redeemed.

Portfolio Characteristics as of 03/31/2013

Total Assets	$24,805,457,940
Average Duration (Years)	4.27
Average Maturity (Years)	6.37
Average Coupon	3.05%
30-day SEC Yield - Class: Institutional	2.69%
30-day SEC Yield - Class: Administrative	0.00%
30-day SEC Yield - Class: Retail	2.50%

The SEC yield is the average annualized net investment income per share for the 30-day period ended on the last day of the month. The yields for the I and M Share Class would have been 2.95% and 2.73% respectively, if the fee waiver and/or expense reimbursement did not apply.

Click here to obtain the most recent month-end yields.

1 Other can include Futures, Options or Swaps, if applicable.

2 The credit quality of the investments in the portfolio does not apply to the stability or safety of the Fund. Gradations of creditworthiness are indicated by rating symbols, with each symbol representing a group in which the credit characteristics are broadly the same. The AAA rating is the highest (best) rating and D is the lowest (worst) rating, the Unrated category contains bonds that are not rated by a nationally recognized statistical rating organization. MetWest receives credit quality rating on the underlying securities held by the fund from Moody's, Standard & Poors and Fitch. MetWest created the "Quality Distribution" breakdown by taking the highest rating of the three agencies when two or three of the agencies rate a security. If only one agency rated a security, MetWest will use that rating. Quality Distribution UST/AGY % includes mortgage- and asset-backed securities that are issued by the U.S. Government and government agencies. Credit quality ratings are subject to change and pertain to the underlying holdings of the Fund and not the Fund itself. Holdings ≤ B were purchased at B or better.