European Factors to Watch-Shares to gain, focus on commodities

LONDON, Aug 26 (Reuters) - European shares were expected to rise for a third straight session on Monday, tracking gains on Wall Street and in Asia, with stronger oil and metals prices seen supporting commodity stocks and the wider equity market. Trading volumes were likely to be thin due to a public holiday in the United Kingdom and an absence of major economic data releases in Europe and the United States. IG markets predicted Germany's DAX to open 27 points, or 0.3 percent, higher and