a conspiracy theorist might be inclined to see this as evidence of wires holding up the markets:

http://zerohedge.blogspot.com/2009/0...s-are-off.html

Bearish bets made impossible, compliments of UBS. Either that, or UBS' recently upgraded (with i7 chips of course) computers just cant handle the basis calculations. Either way, is something very fried with ETFs going on behind the scenes?

IMPORTANT NOTICE: Inverse, Leveraged and Inverse-Leveraged Exchange Traded Funds are no longer available for new or additional purchases at UBS

Effective July 27, 2009, UBS is suspending the offering of Inverse, Leveraged and Inverse-Leveraged Exchange Traded Funds (ETFs). You will no longer be able to make new or additional purchases and will only be able to liquidate current positions through UBS at this time. Any attempt to execute a trade of such ETFs will be rejected.

Please contact your Financial Advisor with questions.
Hopefully iShares and Direxion have some good class action defense lawyers.
I am coming to the realization that they may be able to keep the balls in the air for years.