Stocks shook off an early slump and wound up little changed on Wall Street as gains for some big tech companies were offset by losses in other sectors, the AP reports. The S&P 500 index eked out a tiny gain Tuesday, extending a winning streak into a fourth day. Small-company stocks fell. Facebook jumped 3.3% and Apple added 1.5%. Airline stocks rose after Delta raised its profit forecast for the current quarter. Delta jumped 6%. Walgreens Boots Alliance sank 12.8% after slashing its forecast for full-year results. The S&P 500 edged up less than 1 point to 2,867. The Dow Jones Industrial Average lost 79 points, or 0.3%, to 26,179. The Nasdaq edged up 19 points, or 0.3%, to 7,848. (More stock market stories.)