On CNBC's “Mad Money Lightning Round,” Jim Cramer recommended buying ONEOK, Inc. (NYSE: OKE) and “can't believe it's this low."On the earnings front, ONEOK, on Aug. 4, reported second-quarter earnings of $1.34 per share. It beat the analyst consensus estimate of$1.29 per share. Sales came in at $7.887 billion, topping market estimates of$7.131 billion.Cramer also says American Electric Power Company, Inc. (NASDAQ: AEP) is a buy.On September 25, Morgan Stanley analyst Stephen Byrd maintained an Overweight ...