I have some experience way back yonder watching s few stocks get pummelled from NSS only because of death spiral financing, which is generally convertable preferreds that can be converted based on a % of the stock price, without a hard floor, since the NSSer isnt really nakkie, since they can always cover. the cool part for the seller is that they are generally short at a much higher average than where they convert the preferreds, as long as they can convert the preferreds to common shares at 80% they are never at real risk, hence they can sell sell sell... In fact, our own mr Mulshine actually unwittingly approved sedona's death by allowing sedona to issue those death spiral convertable preferreds to be issued to sedona in the first place. They were one of the first to employ that horrendous financing technique.
Not saying that is the case, but when you have convertable preferreds with no hard floor, huge increase in A/S, and a pummelling of the stock, you gotta think NSS with all the resources to cover whenever they want with NO effect on the demand for the stock.