In finance, few terms are as widely and potentially confusing as "spread." The word carries many meanings, and each is critical to understanding market dynamics and investing strategies. From the difference between bid and ask prices to complex options strategies, spreads are important to know for nearly every aspect of financial markets.

A spread in finance typically refers to some form of difference or gap between two related values. In stock trading, the spread generally refers to the gap between buying and selling prices. In bonds, it indicates the yield differential between two securities. Options traders use spreads to create sophisticated risk management strategies, while forex traders focus on currency pair differences.