* U.S. November year-on-year core CPI increase seen moderating * Focus on slew of central bank meetings led by Fed * Fed widely expected to lift interest rates by 50 bps * Dollar gives up gains of 1st 3 quarters in 2 months -analyst (Recasts, updates prices, adds new comment) By Gertrude Chavez-Dreyfuss NEW YORK, Dec 12 (Reuters) – The dollar gained against most currencies on Monday in choppy trading ahead of key data expected to show U.S. inflation moderating in November on a year-on-year basis, and a Federal Reserve decision that likely slows the pace of rate increases at the conclusion of its two-day policy meeting on Wednesday. Since a peak in late September, the dollar index has declined by more the 8%, with the greenback expected to have diminished appeal with lower yields in assets such as Treasuries as the Fed slows down. In afternoon trading, the dollar rose 0.8% against the Japanese currency to 137.71 yen It also climbed…
