The transition away from easy money has always seemed the most perilous step of the plan to deal with the crisis of 2008
Well with US growing at 4.1% thanks in large part to the tax cut that Trump pushed for, the transition is proving less perilous.
Still plenty of things can go wrong as the volatility in markets show but a growing US ecomony helps keep investores sanguine.
Thoughts of a Cynical Investor 
Tax cuts aren’t needed at this point of the biz cycle. Except to build political points for Trump & provide buffer for trade wars. It’s basically an amphetamine kick that will exaggerate the crash in the next recession.