U.S. stocks bounced back Monday from their worst week of the year on optimism that European leaders would find a way out of the sovereign debt crisis. The dollar gained versus the yen, but fell against the euro and the pound. Light sweet crude oil for June delivery rose $1.09 to $92.57 a barrel on the New York Mercantile Exchange. Gold futures dropped $3.20 to $1,588.70 an ounce. All three indexes rebounded Monday. The Dow Jones industrial average posted its biggest gain in over a month. The broader Standard & Poorâ€™s 500 index made its best performance in over two months. The technology-heavy Nasdaq composite index had its best gains of the year. The Dow rose 135.1, or 1.09 percent, to 12,504.48. The S&P 500 gained 20.77, or 1.60 percent, to 1,315.99. The Nasdaq earned 68.42, or 2.46 percent, to 2,847.21. Facebook continued to struggle after debuting on the Nasdaq last week. The social networkâ€™s shares plunged as much as 16 percent, before finishing down 11 percent at $34.03, which was well below the $38 initial public offering price.