IMHO the market rallied when Trump became President for a few different reasons.

NO new regulations, ACA would be gone, big tax cuts, infrastructure stimulus, thoughts of 4%GDP

Now, ACA is here to stay and all it's goodies that have yet to go into affect. Tax reform will be more difficult, and there certainly won't be the big tax cuts we hoped for. Not sure how we could get any meaningful infrastructure stimulus. And no way do we see 4%GDP. I think we may be in for a bumpy ride in the near term.