State Street SPDR Bloomberg International Treasury Bond ETF

BWXAMEX · USD
21.34USD0.00 (+0.48%)

State Street SPDR Bloomberg International Treasury Bond ETF (BWX) Historical Volatility

BWX 30-day historical volatility is 8%. This ranks in the 70th percentile of readings over the past year.

Read more

Tracking BWX historical volatility helps you see how much State Street SPDR Bloomberg International Treasury Bond ETF's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, State Street SPDR Bloomberg International Treasury Bond ETF's HV tells you what really happened. Use our scanner to monitor BWX 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 an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The BWX 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing State Street SPDR Bloomberg International Treasury Bond ETF's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.

SPDR Bloomberg International Treasury Bond ETF seeks to provide investment results that, before fees and expenses, correspond generally to the price and yield performance of the Bloomberg Global Treasury ex-US Capped Index (the "Index")Seeks to provide exposure to fixed-rate local currency sovereign debt of investment grade countries outside the United StatesIndex includes government bonds issued by investment grade countries outside the United States, in local currencies, that have a remaining maturity of one year or more and are rated investment gradeRebalanced on the last business day of the month

Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts State Street SPDR Bloomberg International Treasury Bond ETF's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where BWX HV is running hot, cold, or in line. Make the BWX 30 day historical volatility — and every other window — work for your edge instead of against it.

IV vs HV
Implied Volatility (IV) vs Historical Volatility (HV) over the past month.

As of September 25, 2026

IV - HV Difference
Difference between IV and HV over time. Positive values indicate IV > HV.

As of September 25, 2026

See how volatility has moved over time

Track BWX historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.

Start your 14-day free trial