At-the-market: At-the-market (ATM) investing is a strategy which involves buying and selling shares of a stock directly on the market. It is typically employed by investors wanting to take advantage of short-term, intra-day price movements. With this type of investment, investors can quickly capitalize on favorable market conditions as well as minimize losses in unfavorable ones. ATM investing offers a more flexible approach than traditional long-term buy-and-hold investing strategies, allowing investors to switch up their tactics depending on market conditions.