It's hard to find anyone that's bearish.

2017 was one of the most profitable for the S&P 500 in this bull market, now in its ninth year, with a 19.4% gain. And all the lead strategists at top Wall Street firms expect many of the same catalysts to lift stocks again in 2018, particularly earnings growth and US economic expansion.

Across the board, Republican tax bill is expected to boost the profits of America's largest companies, and possibly reward shareholders through more buybacks.

But this year may not rival 2017 as one of the most peaceful in the market's history. Some strategists warn that the regular pullbacks that create volatility could resume.

Here's what strategists forecast for 2018, in ascending order of their year-end targets for the S&P 500.