KEY POINTS
  • Lowe's stock popped on strong earnings and a short-squeeze from investors, CNBC's Jim Cramer says.
  • Hedge fund managers bet against the stock after seeing results from Home Depot the day prior, the "Mad Money" host says.
  • "Traders know that discipline trumps conviction, that's a rule. If a trade goes against you, you have to get out, which in this case means covering your short positions at any price," he says.

Shares of Lowe's surged more than 10% after the company posted better-expected results in its second quarter raised guidnace on Wednesday.

That's not the only thing that propped the stock's rally during the session, if you ask CNBC's Jim Cramer.