Stock and options exchanges are closed in the U.S. on Monday; this will be the first (unscheduled) market-wide shutdown since the 9/11 attacks due to the impending Hurricane Sandy. U.S. Securities and Exchange Commission announced that all trading of U.S. equities will be cancelled on Monday. Depending upon the impact of Sandy on Monday night, it is possible markets will be closed Tuesday as well.
As you can see in the graphic above, Futures are still trading.
Asian markets were mixed; Crude is lower, but gasoline prices are ticking up. European markets fell modestly.