Cramer Shares His Thoughts On American Airlines, American Tower And More

On CNBC's latest "Mad Money Lightning Round," Jim Cramer said American Airlines Group Inc AAL has moved up too much. He would buy Boeing Co BA instead.

Cramer prefers Crown Castle International Corp CCI over American Tower Corp AMT.

The day for Opko Health Inc. OPK is not arriving, at least not anytime soon, thinks Cramer.

General Motors Company GM could be worth far more, said Cramer, adding that it is "real good" — though it will never be the next Tesla Inc TSLA.

If you want a speculative stock, Surface Oncology Inc SURF is a very good place to be.

S&P Global Inc SPGI is a remarkable company, said Cramer. He would buy more.