Ameren Corp. said Friday its board raised the quarterly dividend by 4%. The gas and electric company said it will pay a quarterly dividend of 49.5 cents a share, compared with a previous dividend of 47.5 cents. The dividend is payable Dec. 31 to shareholders of record as of Dec. 11. Ameren shares rose 0.8% to $77.49 in recent activity. Market Pulse Stories are Rapid-fire, short news bursts on stocks and markets as they move. Visit MarketWatch.com for more information on this news.