When I first entered the investing world, I spend a lot of time googling the key terms in share market. Definitely, Investopedia was my favorite website to learn the meaning of those words. Although there are thousands of terminologies that a stock market investor/trader should know, however, they are a handful of them which are repeatedly used. Brokerage Products and Services offered by Firstrade Securities, Inc. Review Firstrade’s brokerage services with FINRA BrokerCheck. Online trading has inherent risk due to system response and access times that may vary due to market conditions, system performance, and other factors. Definitions for key options terminology such as long vs. short positions, strike price, in-the-money, assignment and other terms. Key Options Terms So if a call has a strike price of $50 and the stock is trading at $55, that option is in-the-money. For put options, it means the stock price is below the strike price. So if a put has a