Definitions for "Uptick Rule"
Keywords:  tick, sec, folliwing, tsx, downtick
The requirement in US Stock markets that a short sale may not be executed immediately folliwing a downward move, or downtick.
In the U.S., a regulation whereby a security may not be sold short unless the last trade prior to the short sale was at a price lower than the price at which the short sale is executed.
SEC rule that selling short is allowed only on an up tick.