Limit down refers to a situation in the financial market where the price of a commodity, stock, or security falls to its maximum allowable limit set by the exchange or regulatory body. There are several synonyms for this term, including circuit breaker, lower limit, maximum downtick, and trading curb. These terms all indicate a restriction or pause in trading activity due to market volatility or sudden price drops. In effect, limit down mechanisms are put in place to prevent sudden price crashes and to help stabilize the market during periods of high uncertainty and panic selling. Understanding these synonyms will aid investors and traders in correctly interpreting market conditions.