Thats what put options are for.
If you work at a startup that is about to IPO, there is a high chance that the brokers will find you and will pitch you all of these services.
"After we sold Broadcast.com, I hedged my stock with synthetic indexes, in case the market cratered in the six months before I could hedge my actual Yahoo shares. It cost me $20 million, but I protected what I had."
http://www.fastcompany.com/magazine/63/fasttalk.html
So he effectively hedged out his dot-com-bubble risk, not his yahoo-is-relatively-speaking-a-turd risk.
>> So he effectively hedged out his dot-com-bubble risk, not his yahoo-is-relatively-speaking-a-turd risk.
True, although at that time those two were highly correlated.I should note though that the executives and venture capitalists are ALSO locked out, which is why you don't see LinkedIn stock entering the market currently.