Learn about widow makers in financial markets: trades notorious for causing major losses. Explore notable real-world examples ...

Calendar spreads are an option trade that involves selling a short-term option and buying a longer-term option with the same strike. Traders can use calls or puts and they can be set up to be neutral, ...

Understand the market-maker spread as the price gap between buying and selling offers by market makers, and how it compensates for market-making risks.