Stocks fell Thursday as the longest rally since July petered out. Traders continue to watch developments in Syria, where President Bashar Assad said his government has agreed to surrender its chemical weapons in response to a Russian proposal, not because of the threat of a US attack. In corporate news, shares of Lululemon Athletica dropped after the high-end yoga apparel maker cut its forecast for sales and profit this year, due partly to a product recall. Men’s Wearhouse also struggled after the company cut its full-year profit forecast. In other trading, the price of crude oil rose $1.04 to $108.60 a barrel. And gold fell to $1,330.60 an ounce.