Short selling is an investment strategy where an investor borrows an asset, such as company shares, and sells it on the open market with the expectation that its price will decline. The goal is to buy the asset back at a lower price in the future, return the borrowed shares, and profit from the difference. Activist short selling involves investors shorting an asset, and then publicly disseminating negative information about the asset, e.g., the company, to deliberately drive down its share price.