If the stock price of a target company jumps up when the acquisition of the company is announced, the market .

The market cannot be strong form efficient.

Explanation:

A market seems to be a real or conceptual location wherever production and consumption forces work, and also where market participants compete for capital or transact to exchange products or arrangements or equipment.The market now also needs to illustrate all of the documentation or details available in the individual's domain in case of an increase form effective and cheaper. That won't be giving you any chance of an increase in price.

Answergoing above and  beyond the norms of corporate ethical behavior;