Minus Tick Designates a trade that occurs at a lower price than the immediately preceding trade. Also referred to as "downtick" or "zero minus tick". Investopedia Says: Brokerage firms require that short sell orders follow the "tick test", which means that if a stock is trading at a minus tick price (lower than the previous sale), a short sale at that time is not allowed. Generally, short sales are only allowed to occur on an uptick. This rule helps prevent traders from destabilizing a stock's price by short selling on minus ticks. Related Terms: Downtick Short Exempt Short Sale Rule Short Selling Tick Tick-Test Rules Zero Minus Tick Zero Plus Tick |