Thu, May 23, 2013, 1:31 PM EDT - U.S. Markets close in 2 hrs 29 mins
and rising over the month.
The reason for it being under 16 is that all the sellers who want to sell below 16 haven't yet sold.The shorts are looking for sellers at much lower levels, but by the time they see there aren't any, there will be only sellers for them above 20!