According to a May 2, 2018, article from ETF.com,1 there have been more than 100 exchange-traded funds (ETFs) that have more than doubled their asset totals since the beginning of 2018. However, the fastest-growing one, on a percentage basis, comes from the fixed income universe: the WisdomTree Bloomberg Floating Rate Treasury Fund (USFR(. 

The fastest-growing ETF year-to-date coming from the fixed income space may catch some observers a bit off-guard, especially considering the fact the federal reserve (Fed) is tightening monetary policy and the U.S. Treasury (UST) 10-Year yield has risen by, at one point this year, almost 100 basis points. The former observation is the key factor behind this asset explosion of 5,000% through the first four months of 2018. It seems to be no coincidence that this surge has occurred against the backdrop of the Fed picking up its pace of rate hikes and providing forward guidance that additional moves are anticipated for both 2019 and 2020, according to the Fed'sprojections. In other words, investors have been searching for solutions to help mitigate interest rate risk in their bond portfolios, and USFR recently has been discovered as an ideal strategy to achieve such a goal, no doubt resulting in this eye-opening pace of growth. 

What Is a Treasury Floating Rate Note (FRN (?

In January 2014, the UST 2-Year FRN became the latest issue in the Treasury' supply arsenal. These securities are auctioned on a monthly basis, and in a relatively short period of time they have grown to a total of $334 billion, as of this writing. In fact, as a result of the Treasury's supply needs, the auction size of the FRN has now been increased twice so far in 2018. The interest rate of an FRN changes, or “floats,” over the life of the FRN, and is reset weekly based on a reference rate that is determined at the weekly 3-Month Treasury Bill auction.