FOREX-BOJ tweak stirs yen volatility; dollar stays down after US data
(Updates prices throughout, adds tables, analyst comments in paragraphs 4, 5, 6, 11 and 12; removes LONDON from dateline) By Laura Matthews NEW YORK, July 28 (Reuters) - The yen had its most volatile trading session in months on Friday after the Bank of Japan tweaked its yield curve control policy, ...