That of course is complete nonsense. There is substantial evidence for strong (weak) stocks to remain strong (weak).
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=299107
"There is substantial evidence that indicates that stocks that perform the best (worst) over a three- to 12-month period tend to continue to perform well (poorly) over the subsequent three to 12 months.
Momentum trading strategies that exploit this phenomenon have been consistently profitable in the United States and in most developed markets."
French's dataset going back to 1927 is here for anyone who wants to play around with it
http://mba.tuck.dartmouth.edu/pages/faculty/ken.french/data_library.html
There's a million scientific studies documenting the existence of momentum profits in stocks (and every other market on the planet). Yet here you are claiming the opposite. Go figure!