Jim Cramer Weighs In On Exelon, Okta, Wrkco And More

On CNBC's "Mad Money Lightning Round", Jim Cramer said he would hold on to Harsco Corporation HSC. He thinks the company is a great American manufacturer.

Nucor Corporation NUE is the best steel company in the world, said Cramer. He added that it has a nice yield and it generates a huge amount of cash flow. He advised his viewer to hold on to it.

In the short term, the utility stocks are way too high, said Cramer. He added that Exelon Corporation EXC is a good company and he would buy more if it comes down.

Cramer thinks that Harsco Corporation HSC is a buy. He likes the merger because it takes out a competitor.

Cramer can't recommend WRKCO INC WRK as a buy. He wouldn't sell it because it has a 4 percent yield.

Immunomedics, Inc. IMMU has a very good business, but Cramer likes Illumina, Inc. ILMN better.

Okta Inc OKTA is a high risk stock, said Cramer. He explained that it's up 150 percent, but it's in the enterprise software sector, which he really likes. He would wait for the earnings report or maybe buy some ahead of the report and some after the report.

Cramer has always liked National Fuel Gas Co. NFG. He thinks it's a good company.