Janus Henderson Small/Mid Cap Growth Alpha ETF

JSMDNASDAQ · USD
89.85USD-0.74 (-0.82%)

Janus Henderson Small/Mid Cap Growth Alpha ETF (JSMD) Historical Volatility

JSMD 30-day historical volatility is 14%. This ranks in the 0th percentile of readings over the past year.

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Tracking JSMD historical volatility helps you see how much Janus Henderson Small/Mid Cap Growth Alpha 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, Janus Henderson Small/Mid Cap Growth Alpha ETF's HV tells you what really happened. Use our scanner to monitor JSMD 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 JSMD 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Janus Henderson Small/Mid Cap Growth Alpha 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.

The fund pursues its investment objective by normally investing at least 80% of its net assets in the securities that comprise the underlying index. The underlying index is composed of common stocks of small- and medium-sized companies that are included in the Solactive Small/Mid Cap Index, a universe of 2,500 small- and medium-sized capitalization stocks.

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 Janus Henderson Small/Mid Cap Growth Alpha ETF's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where JSMD HV is running hot, cold, or in line. Make the JSMD 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 JSMD historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.

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