Volatility as a judgement

The third judgement is the one shares never required and options traders most often ignore: not which way or when, but whether the move will exceed what the market already expects. Volatility is a judgement about the crowd's expectation, and it is where directional traders lose while being right.

What the volatility judgement is

Implied volatility is the market's expectation of movement, baked into the premium (module 1) - so buying an option is buying an expected move at a price, and the option pays only if the actual move exceeds the priced one. The volatility judgement is whether it will: is the market's implied volatility too low (the move will be bigger than priced, favouring the buyer) or too high (the move will fall short, favouring the seller)? This is a judgement about the market's own expectation - a disagreement with the crowd's priced consensus on movement, held to the platform's crowd-reading discipline.

Implied versus realised, as the judgement

• Buying when implied is low: if the market underprices the coming move, a bought option's premium is cheap relative to what the underlying will do - the buyer's favourable volatility judgement.
• Selling when implied is high: if the market overprices the coming move, a sold option collects an inflated premium against a move that falls short - the seller's favourable volatility judgement, with the tail risk of module 4 attached.
• The event case: implied volatility inflates before events and crushes after (module 1) - so buying into an event pays high implied volatility (a poor volatility judgement unless the move is exceptional), and selling into it collects the inflation (a favourable one, with the event's gap risk).

Why share traders lose to it

A share trader has no volatility judgement - a share has no implied volatility - so the instinct to buy an option on a directional view ignores whether the volatility is expensive, and the buyer overpays for a move the market already expected. The famous loss is buying calls before earnings: correct that the stock will move, wrong that the move will exceed the inflated implied volatility, and the position loses to the crush. The volatility judgement is the options-specific skill: reading whether the market's priced movement is too high or too low, and positioning with the reading rather than against it. It is the third judgement, the hardest for share traders, and the one that most often turns a correct direction into a loss.