BeyondSpring Inc
BeyondSpring Inc (BYSI) Historical Volatility
BYSI's 30 day historical volatility is 154.11%, in the 87th percentile of readings over the past year. This is a high percentile, meaning BeyondSpring Inc shares have swung far more than usual. BYSI's 30 day implied volatility sits at 494.72%, with an IV Rank of 89.29%, leaving IV 340.61 points above historical volatility. This means options are pricing in more movement than the stock has actually delivered, as of Nov 13, 2026.
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Tracking BYSI historical volatility helps you see how much BeyondSpring Inc'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, BYSI's HV, also known as realized volatility, shows what actually happened. Use our scanner to monitor BYSI 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. BYSI's 30 day historical volatility, or BYSI HV, is one of the most widely watched readings because it balances responsiveness with stability. Comparing BYSI'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.
BeyondSpring Inc., a clinical stage biopharmaceutical company, together with its subsidiaries, focuses on the development of cancer therapies. The company's lead asset is the Plinabulin, a selective immune-modulating microtubule-binding agent that has completed Phase III clinical trials for the prevention of chemotherapy-induced neutropenia; and for treatment of later-stage non-small cell lung cancer. It is also developing Plinabulin in combination with various immuno-oncology agents, including nivolumab, a PD-1 antibody for the treatment of NSCLC; nivolumab and ipilimumab, a CTLA-4 antibody for the treatment of SCLC; and in combination with PD-1 or PD-L1 antibodies and radiation for the treatment of various cancers.
Historical Volatility
Historical movement is elevated versus the past year. The stock has been unusually active.
As of Nov 13, 2026
As of Nov 13, 2026
As of Nov 13, 2026
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