Used in the context of general equities. Limit order to buy, order to sell, or a stop limit order to sell which is not to be reduced by the amount of an ordinary cash dividend on the ex-dividend date. A "Do not reduce order" applies only to ordinary cash dividends , and not stock dividends or rights .
"DO NOT REDUCE ORDER"
Meaning of "DO NOT REDUCE ORDER" in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012