KEY POINTS
  • Even if most of Trump's economic agenda is passed, stock market gains may still slow, said Strategas Research Partners' Jason Trennert.
  • "It's going to be hard to repeat this year simply because it was a Goldilocks year," he said.

The "easy gains" investors saw in 2017 are going to be "harder to come by," top Wall Street strategist Jason Trennert told CNBC on Friday.

"It's going to be hard to repeat this year simply because it was a Goldilocks year, where interest rates still stayed low, the Fed was largely accommodative, earnings were up a lot," the chairman of Strategas Research Partners said in an interview with "Power Lunch."