SYDNEY (Reuters) - Asian stocks were set to rally on Tuesday as the U.S. Federal Reserve's sweeping pledge to spend whatever it took to stabilise the financial system eased debt market pressures, even if it could not offset the immediate economic hit of the coronavirus.While Wall Street still finished lower, investors in Asia were encouraged enough to lift E-Mini futures for the S&P 500 by 2%.MSCI's broadest index of Asia-Pacific shares outside Japan added 0.5% in early trade, while Nikkei..