*FED BOOSTS QE WITH $45 BILLION IN MONTHLY TREASURY PURCHASES
*FED TO KEEP BUYING MORTGAGE BONDS AT PACE OF $40 BLN PER MONTH
*FED SAYS MONTHLY PURCHASES TO TOTAL $85 BLN
*FED ADOPTS ECONOMIC THRESHOLDS FOR POLICY TIGHTENING
*FED: RATES TO STAY EXCEPTIONALLY LOW WITH JOBLESS ABOVE 6.5%
*FED: RATES TO STAY LOW WITH INFLATION SEEN AT 2.5% OR LESS
*FED: 2012 GROWTH OF 1.7%-1.8% VS 1.7%-2.0% IN SEPTEMBER
*FED: 2013 GROWTH OF 2.3%-3.0% VS 2.5%-3.0% IN SEPTEMBER
