Zero Minus Tick(redirected from Zero-Downtick)
Zero Minus Tick
A trade on a security that occurs at the same price as the security's previous trade, which was itself less than the price on the trade before that. For example, a security that trades for $5 at 10:00, $4.90 at 10:01, and $4.90 at 10:02 has experienced as zero-minus tick. Until 2007, a short sale was not permitted on a zero minus tick. See also: Tick test.
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