17 If markets are strong-form efficient, then event studies should show that new information affects a related stock's price 10 points Multiple Choice eBook Print References for a single day. only when the new information relates to a dividend payment over a range of days with the overreactions exactly offsetting the underreactions. only if the information is company specific Check my work 17 Multiple Choice for a single day. oints eBook only when the new information relates to a dividend payment Print References over a range of days with the overreactions exactly offsetting the underreactions. only if the information is company specific. by a very minimal amount, if any