| The Big Board 's uptick rule prevents the short sale of a stock when the stock is falling in price . | </s><s> begin example future trade </s> <s> | prevent /108/Thwarting/RootInDisc | rule sale </s><s> prevent arbitrage he </s> |
| The anti-takeover measure prevents any outside investor from buying more than 15 % of Jaguar shares without permission until Dec. 31 , 1990 . | policyholder </s><s> start Jaguar </s> <s> | prevent /108/Thwarting/RootInDisc | measure investor </s><s> start effort pay |
