Discard and replace at first sign of weakness or damage. (amazon.co.uk)
Even good managers can have a poor year or two, so bailing out of a fund at the first sign of weakness is not necessarily worthwhile. (financialguidetolife.com)
Buffett warns that if you buy a company for superficial reasons, then there is a tendency to dump the stock at the first sign of weakness. (aaii.com)