Many investors worried about the prospect of rising interest rates are taking a second look at ETFs that invest in floating rate debt.

The Federal Reserve’s bond buying and investors’ desire for safety has pushed 10-year Treasury yields below 2%. However, bond investors could get hurt if interest rates finally start to rise after years of rock-bottom Treasury yields.

Floating rate notes are investment grade bonds that pay a floating rather than fixed rate coupon, which protects investors from rising interest rates. [iShares: Floating Rate Note ETF for Rising Rates]

ETFs in this category include Market Vectors Investment Grade Floating Rate Bond Fund (NYSEArca: FLTR), SPDR Barclays Capital Investment Grade Floating Rate ETF (NYSEArca: FLRN) and iShares Floating Rate Note Fund (NYSEArca: FLOT). [Best ETFs for Floating Rate Bonds]

Investors should keep in mind that floating rate note ETFs are currently paying little in the way of yield. For example, FLOT has a distribution yield of 0.71%, according to manager BlackRock.

Additionally, if rates stay low, these bonds could underperform their fixed-rate counterparts. Floating rate ETFs can also have heavy concentrations in the financial sector.

“Fixed-rate bonds have fared well so far in 2013, but a sudden jump in yields – as occurred in 1994 – would hammer pension funds and insurer portfolios, which have loaded up on fixed-rate debt in recent years,” Reuters reported. “As a precaution, some fund managers worried about a sustained sell-off in the bond market have been replacing some of their pricey fixed-rate rate debt with floating-rate.”

Separately, bank loan ETFs have also been popular with investors who are concerned about rising interest rates. [Bank Loan ETFs Hot on High Yields, Rising Rate Fears]

iShares Floating Rate Note Fund