T12.16 Historical Returns, Standard Deviations, and Frequency Distributions: 1926-1996 (Figure 12.10)
Source: © Stocks, Bonds, Bills, and Inflation 1997 Yearbook™, Ibbotson Associates, Inc., Chicago (annually updates work by Roger G. Ibbotson and Rex A. Sinquefield). All rights reserved.
Average Standard Series Annual Return Deviation Distribution
Large Company Stocks 12.7% 20.3%
Small Company Stocks 17.7 34.1
Long-Term Corporate Bonds 6.0 8.7
Long-Term Government Bonds 5.4 9.2
U.S. Treasury Bills 3.8 3.3