Lehman Brothers -- The Next Banking Casualty?

Natalie Erlich,|News Associate

Lehman shares tumbled more than 20 percent Monday as Wall Street speculated whether or not it's the ailing banking system's next casualty. CNBC's guests offered their perspectives. (Full story: Lehman Shares Hit as Domino Speculation Grows)

High Implied Volatility

"I'd be keeping an eye on Lehman Brothers.

"Obviously, implied volatility on all the brokerages was sharply higher on Friday— I mean Morgan Stanley was up by half, and Goldman Sachs and Merrill Lynch [were] up by a quarter, but implied volatility in Lehman Brothers' options was up by more than 93 percent on Friday."

- Rebecca Darst, Interactive Brokers



Reliance on Repo Funding

“Can it happen at Lehman Brothers ? Yes, it can happen for any of the brokers. They’re very dependent on repo funding. Depending on the maturity—maturity file of that repo book, I mean it could happen to anyone.

"Will it? I’m less inclined to think it will, because Bear did kind of stand out as being more dependent on repo funding than its peers … I don’t think it happens at Lehman Brothers or any of the peers, but unfortunately I can’t sit here and tell you that it won’t.”

- Jeffery Harte, Sandler O'Neill