Investing.com - European shares were mixed and the dollar rose on Wednesday as markets awaited the outcome of the U.S. Federal Reserve's meeting. The Fed was expected to hold rates steady, but leave the door open to further hikes later this year. Oil prices rallied after OPEC said a meeting on an output freeze would take place next month. London's FTSE 100 and the pound remained subdued ahead of Chancellor George Osborne's annual budget later in the day.