The $900 Billion Influx That's Wreaking Havoc in U.S. Bills

``The mismatch between supply and demand has been so acute that four-week bill rates fell to minus 0.0304 percent on April 29, the lowest on a closing basis since December 2008. Yields on three-month bills also turned negative. The Treasury responded by saying at its quarterly refunding announcement on May 6 it would increase issuance to meet growing demand.''