TOKYO :The Bank of Japan is firming up a strategy to unload its huge holdings of risky assets that will likely centre on a plan to gradually sell exchange-traded funds (ETF) in the market, said three sources familiar with its thinking. There is no consensus yet on when a decision about that would be made, the sources said, with the timing complicated in part by political turmoil caused by Prime Minister Shigeru Ishiba's resignation. The move would be the last piece of Governor Kazuo Ueda's plan