iShares Treasury Floating Rate Bond ETF
iShares Treasury Floating Rate Bond ETF (TFLO) Historical Volatility
TFLO's 30 day historical volatility is 1.45%, in the 100th percentile of readings over the past year. This is a high percentile, meaning iShares Treasury Floating Rate Bond ETF shares have swung far more than usual. TFLO's 30 day implied volatility sits at 6.50%, with an IV Rank of 5.95%, leaving IV 5.05 points above historical volatility. This means options are pricing in more movement than the stock has actually delivered, as of Nov 3, 2026.
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Tracking TFLO historical volatility helps you see how much iShares Treasury Floating Rate Bond ETF's stock price has actually moved, giving you a baseline for whether option premiums look fair, cheap, or expensive. While implied volatility shows what the market expects, TFLO's HV, also known as realized volatility, shows what actually happened. Use our scanner to monitor TFLO 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.
Historical volatility is the annualized standard deviation of a stock's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. TFLO's 30 day historical volatility, or TFLO HV, is one of the most widely watched readings because it balances responsiveness with stability. Comparing TFLO's HV to its implied volatility reveals the volatility risk premium. When IV sits well above HV, options are pricing in more movement than the stock has actually delivered, giving option sellers an edge. When HV runs hot relative to IV, options are pricing in less movement than the stock has delivered, and buyers may be underpaying for it.
The iShares Treasury Floating Rate Bond ETF seeks to track the investment results of an index composed of U.S. Treasury floating rate bonds.
Historical Volatility
Historical movement is elevated versus the past year. The stock has been unusually active.
As of Nov 3, 2026
As of Nov 3, 2026
As of Nov 3, 2026
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