Spok Holdings Inc (SPOK) Historical Volatility

Tracking SPOK historical volatility helps you see how much Spok Holdings 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, SPOK's HV, also known as realized volatility, shows what actually happened. Use our scanner to monitor SPOK 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. SPOK's 30 day historical volatility, or SPOK HV, is one of the most widely watched readings because it balances responsiveness with stability. Comparing SPOK'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.

Spok Holdings, Inc., through its subsidiary, Spok, Inc., provides healthcare communication solutions in the United States, Europe, Canada, Australia, Asia, and the Middle East. It delivers clinical information to care teams when and where it matters to enhance patient outcomes. The company offers subscriptions to one-way or two-way messaging services; and ancillary services, such as voicemail, and equipment loss or maintenance protection services, as well as sells devices to resellers who lease or resell them to their subscribers. Its Spok Care Connect platform enhance workflows for clinicians and support administrative compliance.