 Stocks wavered to a mixed close, nudging the S&P 500 and the Nasdaq Composite to more records. The S&P 500 inched up 0.1%. The Nasdaq Composite rose 0.3%. The Dow Jones Industrial Average gave up an early gain and fell 31 points. That's about 0.1%. Specialty glassware maker Corning surged after raising its sales forecast. Traders are looking ahead to several earnings reports this week, including updates from Delta Airlines on Thursday and J.P. Morgan's Citigroup in Wells Fargo on Friday.