On an exchange, a transaction of a security in which the price is the same as the previous transaction. Whether the price before zero tick was higher or lower may affect what kind of transaction may take place next. See also: zero-minus tick, zero-plus tick.
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A security transaction in which the sale price is identical to the price of the immediately preceding transaction in the same security.
Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.