SHV is among a group of popular bond ETF plays this year as the Fed eyes rate hikes.

To hedge rate risk, ETF investors have funneled close to $6 billion into SHV so far this year; Investors put $2.5 billion into SHV in April alone.

SHV tracks the ICE U.S. Treasury Short Bond Index, which is comprised of U.S. Treasury obligations with a maximum remaining term to maturity of 12 months.

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