WPL jumped $2 over the last few days. May be due to the TO talk that includes BHP looking at them. RIV is also mentioned again as a possible BHP target in this article.
http://www.bloomberg.com/news/2010-11-04/anadarko-woodside-may-be-bhp-targets-after-potash-bid-blocked-ubs-says.html
Dont sell short Hold until it is clear IMO