What is an ultra-short Treasury ETF?

An ultra-short Treasury ETF typically holds Treasury bills or very short-dated Treasuries. These funds are often used for cash management inside a brokerage account.

Because maturities are very short, duration is low and price volatility is usually minimal. Yields tend to track short-term interest rates after fees.

If you're using one as a cash alternative, compare yield after expenses, liquidity, and trading spreads. For small trades, spreads can matter more than people expect.