NYSE Arca// Ruling "SDP"- Powershares Ultrashort Utilities NYSE Arca// NYSE Arca Market Management in conjunction with Nasdaq Marketwatch, has ruled to cancel all trades in security Powershares Ultrashort Utilities "SDP" at or below $44.99 that were executed on NYSE Arca between 09:30:00 and 10:20:00 ET. This decision can not be appealed.