NEW YORK (AP) — Stocks are off to a higher start on Wall Street Monday led by more gains in big tech companies. The S&P 500 was up 0.8%. The benchmark index is coming off its eighth losing week in the last nine. The Nasdaq rose 1.2% and the Dow rose 0.5%. Twitter fell 4% after Tesla CEO Elon Musk threatened to call of his deal to buy the company, saying Twitter was refusing to hand over data. Spirit Airlines rose 2% after JetBlue raised its offer to buy the rival carrier, and Amazon rose 3% after executing a 20-for-1 stock split.