LONDON (Reuters) - Global stocks rose on Friday as investors firmed up bets on a U.S. interest rate cut at the end of July after a speech by a top Federal Reserve official further cemented expectations for one, fuelling appetite for risky assets and capping the dollar.European shares opened higher across the board, but had given up gains by midday in London. The pan-European STOXX 600 index turned flat after rising as much as 0.7%, as a slump in Italy's stock index and European bank stocks..