What is the least expensive way to sell less than 100 shares of stock?

The least expensive way to sell less than 100 shares of stock is typically to use a discount online brokerage that charges low or no commission fees for trades. Many brokerages now offer commission-free trading, allowing you to sell shares without incurring additional costs. Additionally, consider using a market order, as it generally incurs fewer fees compared to limit orders. Always check for any hidden fees that might apply to your specific brokerage.