hmmmm.... are there some 'plans' in the works behind this?

http://www.bloomberg.com/news/2013-05-01/u-s-sees-floating-rate-note-by-1q-2014-sees-lower-coupon-sizes.html

The U.S. Treasury Department said it plans to sell a floating-rate security as early as the fourth quarter this year and signaled it may decide to “gradually” reduce the supply of notes and bonds at auction.

In its quarterly refunding statement today, the Treasury said a final rule on the floating-rate note auction is planned for coming months, with a first sale estimated to occur either in the fourth quarter this year or the first quarter of 2014. The department said it will use the weekly high rate of 13-week Treasury bill auctions as the index for the notes.

*snip*