'Mad Money Lightning Round': Nine Buys for Merck

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Here's what Jim Cramer had to say about some of the stocks that callers offered up during the "Mad Money Lightning Round" Friday evening:

Constellation Energy ( CEG): "No, we're not going to be in that one; that one's done. I like Duke Energy ( DUK). That's your play."

Merck ( MRK): "This is the most undervalued company of all the drug stocks. I'm giving that one nine buys."

Deere & Co ( DE): "This thing has gone down incredibly. The company's problems are behind them. I'm bullish, but let's wait for a pullback before we buy some."

Weyerhaeuser ( WY): "This yields 6% and I think the yield is safe. That's all that matters."

Philip Morris International ( PM): "I like Philip Morris, but I prefer Altria ( MO). It's domestic and MO is cheaper with a better yield."

Office Depot ( ODP): "I think there was a short squeeze there. But even though it's a dollar stock, I want you to sell, sell, sell and pick up the leader Staples ( SPLS)."

*For all you home-gamers, a 'mon-back opportunity means Cramer would back up the figurative truck and load up on a stock.

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