Prior to the creation of the Washington State Investment Board (WSIB) in 1982, investment of the retirement funds was the responsibility of separate retirement boards. Consequently, no comprehensive rate of return was recorded in those years.

Historical returns were developed by combining the performance of major asset categories in the same proportion as the asset allocation below. 

Asset Allocation1

Asset Class Allocation Indicator of Economic Performance

U.S. Equity

31%

S&P 500

Non-U.S. Equity

15%

S&P 500

Fixed Income

25%

Average of long-term corporate & government bond index

Private Equity

17%

U.S. small cap stock index

Real Estate

12%

Average of long-term corporate & government bond index

1 Adopted November 2001.