Cramer's lightning round: Delta Air Lines is not a buy
Alteryx : "Alteryx is the kind of stock that when the smoke comes out of this market and we go back and see what really works it is better software than what we have. People don't like these stocks right now, but they always come back because they've got great growth. So I'm going to say buy."

Invitae Corp. : "Very, very, very dicey. ... I would rather just see you buy Johnson & Johnson , to be honest."

Delta Air Lines : "No. No, you're not interested in Delta Air Lines. You're not going to be interested in any airline because a lot of these airlines are going to end up having to take money from the government and by the time they do that then you're going to be so diluted that you're not going to make any money."

Realty Income : "No. No, you're 24. I want you to go for growth. You've got plenty of time to get income. You've got to go for companies that are down and out stocks, but fantastic growth. You should look at a stock like Alterxy. That would be good," or Okta or Constellation Brands .

Upwork Inc .: "That is an interesting idea. You know what, I am glad you brought that to my attention. Let me do some work on that."

Switch Inc .: "If you want to go with Switch, I'm going to bless it. Why? Because the data center is hotter than it's ever been because of the amazing amount of traffic that people who work at home are generating."

Nokia : "If you want to go there, we had Marvell on the other day. They've got a good deal with Nokia ... but Nokia itself is not good enough for your money."