NEW YORK (TheStreet) -- With the Christmas holiday cutting the coming week short, trading is expected to be light even though Wall Street will get a final read on U.S. third-quarter economic growth. Next week could also bring a wave of upgrades to 2011 growth expectations spurred by passage of the tax-cut extension bill, according to one market strategist. Phil Orlando, chief equity market strategist at Federated Investors, believes that President Obama's signature on the bill -- which maintains Bush-era tax cuts for all Americans for two more years among other provisions -- could be a big driver to the upside for the stock market next week. ...