Years ago I was invested in a company called Equinix, thought it was gonna be a massive business....but the PPS action said the same thing, "the market doesn't think so"  That was around 2001....I was averaged in around $1.50 and the PPS slid under a buck, I held on and it did rebound, but the move up stalled around $3 and I bailed out, happy with doubling my money.  

Back then I didn't know about naked short selling and delivery failures as a tool to drive a stock's PPS down.  I'm sure whomever bought my EQIX shares for $3 was very happy if they held on long term. 

Today saw another 36,900 forced buy-ins by house 100 for delivery failures, frankly given the direction of the PPS yesterday and today I would have been very surprised if that didn't happen.