Updated with Bruce Berkowitz's comments on Bank of AmericaBOSTON ( TheStreet) -- The top 10 performers in the benchmark S&P 500 so far this year aren't easy to characterize. They range from Freeport-McMoRan Copper & Gold ( FCX) to Bank of America ( BAC). The S&P 500 gained 4.4% in January, the biggest increase for that month in 15 years, helped by signs the European sovereign debt crisis, a cloud over the markets last year, might be coming to a resolution soon. And, perhaps secondarily, the Federal Reserve said it would remain active in boosting the economy and keep inflation in check. The top 10 companies in the S&P 500 in January had share gains that were clustered in the 27% to 39% range, with DVD and digital entertainment deliverer Netflix ( NFLX) the outlier with a whopping 77% jump. Still, if you look back to the end of 2010, many of these stocks are still in the hole, so a month or so of increases doesn't wipe that out. In inverse order of return, here are the S&P 500's 10 best-performing stocks of January with their performance for the month: 10. CA ( CA) Performance: up 26% Company profile: CA is one of the largest independent providers of IT management software. Revenue from its core mainframe segment represents about 60% of total sales. Investor takeaway: Shares jumped late in January after the company reported third-quarter earnings rose 32% and announced plans to raise its annual dividend five-fold to $1.