(Reuters) - Pfizer Inc’s (PFE.N) quarterly profit jumped almost 16 times compared to a year ago on Tuesday, as the largest U.S. drugmaker booked an $11 billion gain from the new tax law. The company said its net income surged to $12.27 billion, or $2.02 per share, in the fourth quarter, from $775 million, or 13 cents per share, a year earlier. The drugmaker said it gained $11.34 billion from the new tax law, signed into law by President Donald Trump last month.