During the 1926-2010 period the geometric mean return on Treasury bonds was _________. Investments Chapter 5 During the 1926-2010 period the geometric mean return on Treasury bonds was _________. A. 5.12% B. 5.56% C. 9.34% D. 11.43% Answer: A. 5.12% Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+