ok I got a 3 day sub for free to try and find out some answers
Over the last month Goldman Sacs has been the largest sellers, but its not just WDS they are selling, see screen shots below (risk off strategy for banks IMO)
Then over the last 3 months
WDS has been falling for a year now, here are the culprits
Over the last year, these are the net volume/shares (changes in position size) with the largest net value change (turned over stock in $$$)
Morgan Stanley Securities -0.9%
Morgan Stanley Securities -0.8%
UBS Securities -0.6
JP Morgan -0.5
Citigroup -0.5
Goldman Sachs -0.4
Anyway, a load of SP fall for not a lot of change in position size
If anyone has the short interest held over a 1 year period it would make for interesting reading, I would bet these companies are in that list!
(20min delay)