UPDATE 1-Japan cenbank loses billions on ETFs, may face annual loss <!-- no image --> <div>* Stepped-up ETF buying makes BOJ vulnerable to market falls (Adds comments, background)<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ThCaAI8me5U:R8eIrtMVVfE:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ThCaAI8me5U:R8eIrtMVVfE:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=ThCaAI8me5U:R8eIrtMVVfE:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ThCaAI8me5U:R8eIrtMVVfE:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=ThCaAI8me5U:R8eIrtMVVfE:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/ThCaAI8me5U" height="1" width="1" alt=""></div> Posted by Reuters