Volatility and price expectation

WoodyFox 

I have one question for ya. Over time will the realized range fall within the expected range, based of implied volatility, 68.2% of the time or less? If your answer is yes. Good. If you answer no and can prove it, I will personally enter you for the David Hilbert Award. LOL just sayin. Read this https://info.veritasts.com/insights/what-are-historical-and-implied-price-volatilities-telling-us

Past performance is not indicative of future results. Without a mathematical proof to show why that percentage is constant we should always assume that such stats can change.

But there are periods where it is less than that, and it's up to the trader to determine for how long that can go wrong before they can't trade that strategy.