S&P 500 loses some altitude in the final hour of trading

Still a big day The S&P 500 has halved its gain on the day. The index is trading up 15 points to 2642 from as high as 2657. That's not an ideal way to break out to a new high but the market is certainly enthusiastic about the tax plan.
S&P 500 loses some altitude in the final hour of trading