Japan central bank loses billions on ETFs, may face annual loss

TOKYO (Reuters) - The Bank of Japan on Tuesday acknowledged unrealised losses of 2-3 trillion yen (15-23 billion pounds) on its holdings of exchange-traded funds (ETFs) after a rout in Japanese stock prices, raising the prospect it could post an annual loss this year.Analysts said a loss - highly unusual for a central bank - would be the first by the BOJ in nearly 40 years and could constrain the bank's attempts to prop up market sentiment with continued aggressive stock purchases.The financial..