In May, bond rates for Series I are predicted to drop below 4%.

Inflation-proof and nearly risk-free Series I bonds have seen unprecedented demand over the past year. However, yields have been declining and are expected to continue doing so in May, according to industry experts.

According to the most recent data on the consumer price index, new I bonds acquired in April offer annual returns of 6.89%; however, this rate may drop below 4% in May. The U.S. Department of Labor reports that annual inf....