The completion of the CUSIP change should have no effect whatsoever on one's decision to buy or sell. The CUSIP has nothing to do with why this stock has risen in SP the way it has. I don't know about the rest of you but I bought because of the milestones this company has accomplished, and the incredibly promising developments going forward. There will always be profit takers. CUSIP has nothing to do with this. No reason to expect massive selling when all indicators are biased to upside in share price.
I could have sold today when there were dozens of posts claiming massive sell off and decline in SP to .05, .03 etc. If I had sold, the bashers would have gotten their way and pick up my cheap shares. Instead, I'm holding and letting new entries pay up for the privilege of owning AMBS shares. That's the way the market should work.