Among the 10 major industry sectors in the Standard & Poor's 500 index, tech stocks have rallied 59 percent in 2009, on average, led by well-known names including Google (up 99 percent), Microsoft (59 percent) and IBM (59 percent). The S&P tech sector's advance far outpaces the index's second-best sector, basic-materials stocks, which are up nearly 46 percent year-to-date, on average. In third, fourth and fifth places, respectively: Consumer discretionary stocks (home builders, retailers and restaurants, for example), up 40 percent; industrial issues, up 19 percent; and health care stocks, up 18 percent. The S&P 500 index overall has gained 24 percent for the year. Of course, tech's performance in 2009 is partly a function of how far it fell in 2008, when the average tech issue in the S&P lost nearly 44 percent, worse than the 38 percent loss for the index overall. But when Wall Street is relatively confident about the economic recovery continuing in 2010, tech continues to have widespread appeal among big money managers. Tacoma, Wash.-based Russell Investments, which surveys portfolio managers nationwide every three months, said its fourth-quarter poll found that 82 percent of managers were bullish on tech stocks' prospects in the near term. That was the highest bullish percentage for any of the 10 S&P industry sectors. A year ago, amid the market's meltdown, the Russell survey pegged health care stocks as managers' favorites -- understandable, given the sector's 'defensive' nature. Even so, tech was a close second in that survey, with 62 percent of managers bullish about the industry compared with 66 percent for health care. If they followed their own advice and bought tech shares, those managers are sitting on hefty gains now. In the latest survey, Russell attributes tech stocks' allure to three main factors: solid growth prospects, strong balance sheets (many big tech firms have little debt) and, at least until recently, the weaker dollar, which can boost foreign earnings when they're brought home. Tom O'Halloran, a portfolio manager at Lord Abbett & Co., put it this way in the Russell survey: 'I expect that technology will lead the market due to ongoing innovation, lean operating models, very strong financial structures, and a decade of neglect.' As for valuations, tech issues, like most stocks, aren't the screaming buys they were a year ago. At this point, investors will have to decide whether they're comfortable paying 23 times estimated 2010 earnings per share for Google, 21 times for software company Adobe Systems or 12 times for IBM, to name three examples -- or whether they'd rather wait to see if 2010 brings a chance to buy at lower prices. 