Raising the minimum cash reserve requirements on bank deposits

An Insurance Policy Against Inflation

by Charles Calomiris 

The risk the U.S. faces over the next several years:  Given the huge amount of reserves held by banks in excess of their legal requirements—excess reserves today stand at roughly $1.5 trillion—there is the potential for an even more sudden increase in credit and money growth today, accelerating the inflation rate.

http://www.hoover.org/news/daily-report/110841