Here's what Jim Cramer had to say about some of the stocks during the Mad Money Lightning Round:

Slack (WORK) - Get Slack Technologies, Inc. Class A Report : "This is a very good company. I think you'll be fine, but be careful." 

Xilinx (XLNX) - Get Xilinx, Inc. (XLNX) Report : "This has too much China exposure. People want Nvidia  (NVDA) - Get NVIDIA Corporation Report or Advanced Micro Devices (AMD) - Get Advanced Micro Devices, Inc. Report . I like those better."

Occidental Petroleum (OXY) - Get Occidental Petroleum Corporation Report : "No, don't buy more oil. Fossil fuel stocks are not liked by younger money managers. "

OneSpan (OSPN) - Get OneSpan Inc. Report : "I'm an Okta (OKTA) - Get Okta, Inc. Class A Report fan."

Innovative Industrial Properties (IIPR) - Get Innovative Industrial Properties Inc Report : "Nothing cannabis is working, not even the REITs."

GW Pharmaceuticals (GWPH) - Get GW Pharmaceuticals PLC Sponsored ADR Report : "I think this one is really good."

Covanta (CVA) - Get Covanta Holding Corporation Report : "People don't trust that distribution. I feel confident about it."

TheStreet Recommends

Chicago Mercantile Exchange (CME) - Get CME Group Inc. Class A Report : "If this one comes in, I want to buy more."

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At the time of publication, Cramer's Action Alerts PLUS had a position in NVDA.