Quote from ScalperJoe:
Interesting comment. I noticed extremely large bids on the Level II when it dropped intraday to the offer price of $38, bids in the MILLIONS of shares per exchange, it was truly insane.
The following quote is from the Greenshoe definition on Wiki, which is very telling:
"The SEC currently does not require that underwriters publicly report their short positions nor short-covering transactions. Investors who are unwary of underwriter stabilizing activity who choose to invest in what they perceive to be a stable issue can encounter volatility when the underwriters pause or complete any stabilizing activity."
Once the street begins coverage and the analysts start providing forward earnings estimates, it could easily encounter a "cascade of selling" as you mention should it not hold the $38 offer price.
Of course, it could also shoot up and stay up, who knows. I did take it for a quick scalp, to me it's just another symbol to trade.