BOJ breaks its stock buying pattern, sparks talk of tapering

TOKYO (Reuters) - A subtle change in the Bank of Japan's stock buying has sparked debate among market players on whether the central bank is changing its tactics, or even trying to reduce its purchases covertly.The BOJ has not bought exchange traded funds (ETFs) since Oct. 9, its operation disclosure shows, the longest such spell since the it began buying stocks aggressively under Governor Haruhiko Kuroda as part of its broader efforts to stimulate the economy.The change suggests the BOJ could..