1) Dealing 2) Dealings 3) Transaction 
A trade in a particular stock at a price lower than the trade immediately preceding it. On U.S. stock exchanges, you cannot sell a stock short on a downtick.
The transfer of corporate activity from the larger parent to the smaller subsidiary.
A sale of a listed security that occurs at a lower price than the previous transaction.
[n] - a transaction in the stock market at a price below the price of the preceding transaction
noun a transaction in the stock market at a price below the price of the preceding transaction
A transaction executed at a price lower than the preceding transaction in that security, or a new quote registered at a lower price than the preceding quote in that security. (See uptick)
A trade is on a downtick when the last trade occurred at a price lower than the previous one. 
a decline or deterioration in business activity, in mood, etc. · Also calleda slight downward trend in price. Cf. uptick.