Cramer's Lightning Round: Sell Seagen

• It's that time again! "Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

TKO Group's year-to-date stock performance.

TKO Group: "I can't value it. I don't know how to value it, and if I don't know how to value it, I've got others that are hard enough. I'm not going to take on something even more difficult."

DocuSign's year-to-date stock performance.

DocuSign: "DocuSign is going to have to come up with something new and different and special, because right now, what they're doing is not doing enough."

U.S. Bancorp's year-to-date stock performance.

U.S. Bancorp: "Until the Fed's meeting this week and the bond schedule, I would have said don't buy it, and now I think it's incredibly undervalued..."

Zillow's year-to-date stock performance.

Zillow: "Zillow needs more transactions to occur in the real estate business...I'm sorry, because I like the company, but it does not have the volume."

Seagen's year-to-date stock performance.

Seagen: "I want you to sell the stock on Monday. I don't trust the FTC, and you've made all the big money already."

First Solar's year-to-date stock performance.

First Solar: "First Solar is the only solar stock I am currently recommending because it's a pure play, and it is not a play on financing, which it turned out all the others were that went by the wayside.

National Fuel Gas' year-to-date stock performance.

National Fuel Gas: "I don't like National Fuel Gas, it doesn't pay enough, doesn't have the growth that I want..."

KLA's year-to-date stock performance.

KLA: "...KLA is good enough."

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