Tortoise Global Water ETF (TBLU) Historical Volatility

Tracking TBLU historical volatility helps you see how much Tortoise Global Water 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, Tortoise Global Water ETF's HV tells you what really happened. Use our scanner to monitor TBLU 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 TBLU 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Tortoise Global Water 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.

TBLU offers exposure to developed-market all-cap water companies. The fund selects firms that derive at least 40% of gross revenues from either water infrastructure or water equipment and/or services. Water infrastructure companies are those that provide public water distribution, engineering, construction or consulting. Water equipment companies are those who provide water pipes, valves, pumps or water efficiency products such as filtration, treatment, and testing of water. Service companies provide technologies that facilitate management of water distribution, usage, treatment, and irrigation.

The resulting portfolio includes a few dozen names, heavily weighted towards the US. Prior to June 5, 2018, the fund tracked the Tortoise Water Index, providing exposure to water companies in North America. Prior to the merger with Ecofin on Aug. 21, 2020, the fund name was Tortoise Global Water ESG Fund and traded under the ticker: TBLU. After the merger, the fund name changed to Ecofin Global Water ESG Fund and traded under the ticker: EBLU. On September 17, 2024, the fund name and ticker reverted to Tortoise Global Water ESG Fund and TBLU, respectively.

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 Tortoise Global Water ETF's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where TBLU HV is running hot, cold, or in line. Make the TBLU 30 day historical volatility — and every other window — work for your edge instead of against it.