Conversely, when a trader sells to open a call option (a "short call"), it's a bet the stock will stay at or below the strike price through expiration. In other words, this premium-selling ...

The short call spread (or "bear call spread") is a strategy employed by traders who expect a stock to move sideways, or decline slightly, during the time span of the trade. The spread offers a ...

A bullish diagonal spread is an advanced option trade ... has a bullish outlook and thinks the stock could get to the short call strike by the first expiration date. A rise in implied volatility ...