November RBOB experienced a choppy trading session during the initial morning hours. Private industry inventory data released after the close yesterday showed a much larger than expected weekly build in gasoline stocks that was well above the 1 million barrels expected in this morning's EIA figures. The unexpectedly large build probably tempered yesterday's bullish reports that ConocoPhillips would take a Pennsylvania refinery operation off-line and that there would be a controlled shutdown in a Louisiana gasoline refinery.