 The Fed chairman is speaking today at 9 am ET and the market is cautious.US equities sold off late yesterday and have continued lower in the premarket with SP 500 futures down 15 points. The US dollar has also turned higher in the past hour and is trading at the best levels of the day.The thing is, Powell might not comment on markets at all. Hes speaking on a panel and the topic is central bank independence. In general, hes not shy and will touch on the economy even if its n... 