Academy
Market makers are securities firms that trade with their own capital, providing instant execution and earning the bid-ask spread. Understand the difference from matching and how it affects your trades.
Academy
A US stock market circuit breaker is not a shutdown, but a pause button. Understand the three-tier rules (7%/13%/20%) and the difference from single-stock circuit breakers (LULD) in 3 minutes.
Academy
US stocks don't have daily price limits like A-shares; instead, circuit breakers temporarily halt trading. This article explains market-wide and single-stock circuit breakers, plus short sale restrictions, so you can understand US market volatility in 3 minutes.
Academy
Short selling isn't betting the opposite—it's borrowing shares to sell, then buying back cheaper. Profit is limited, losses are unlimited, and you pay borrowing fees and face short-squeeze risk. Understand short selling in 3 minutes.