By Chuck Mikolajczak NEW YORK (Reuters) – A gauge of global stock markets was lower for a second straight day on Wednesday, as a reading on inflation did little to change expectations the U.S. Federal Reserve will remain aggressive in fighting inflation, while the yen jumped as Japan indicated it could move to buttress the weak currency. MSCI’s gauge of stocks across the globe saw its biggest one-day percentage decline in three months on Tuesday after inflation data for August showed consumer prices unexpectedly rose, locking in investor expectations for a rate hike of at least 75 basis points…