I wouldn't buy or sell on a market reaction to bad news unless the impact was at least a 40% drop and then, only if the position has stabilised. Even then, recovery can be a long wait. Recent events at Cape and Lamprell prove that point. Big order books, corrective action but the bounce hasn't yet happened. Indeed the bad news may not be over for Melrose, both Cape and Lamprell suffered a 'double dip' as they served up the bad news as first a starter, then a main course a few weeks later. My advice: do nothing unless and until the price drops below 180p and then only if the long-term prospects are still good.