MarketBeat -blog del WSJ- tiene un post muy informativo, donde explica de que tratan las nuevas pautas de la SEC sobre short selling.
Q: Ok, so what’s different about the new uptick rule versus the old uptick rule.
A: Under the old rule, you could short sell at a price above the last trade price, or after the last price was higher than the previous price. Under the new rule, you wouldn’t be able short unless someone was willing to buy it for more than the national best bid. (That is, for a higher price than anyone is currently offering to pay.)
A: That’s only part of it. The second part is “circuit breaker” element.
Q: Oh yeah. What’s that?
A: That part of the rule says that the shorting curbs come in when a stock’s price falls 10% from the previous day’s close.
Q: For how long?
A: For the entire day in which the shares fell below 10 percent and for the following day.