It seems cash and cash flow are a more effective means of paying for the cleanup than the market cap, but your point is well taken. The cost of the Valdez incident does provide a decent reference point. This is much bigger and has far more economic consequence, but still probably comes in somewhere between $10-25B. The company has $7B in cash and a cash flow of $30B. Yes, you can always raise money against your market cap (like mortgaging your house), which I agree is $115B. So they will take in some water, but not likely sink.