The factors that could derail Wall Street's 2017 surge

A year-long US profit recession has just ended, but earnings growth needs to pick up

Wall Street’s rally could be derailed by renewed worries about President-elect Donald Trump’s policies, a resurgent dollar or potential wild-card events like cyber attacks or a trade war, investors say as they look to 2017.
 
Stocks are at record highs on optimism Trump will boost the economy, and strategists in a recent Reuters poll expect more gains next year.

But they also worry about what could derail the market as a surprising 2016 wraps up and an uncertain 2017 awaits.
 
Here are some potential roadblocks to more gains:
 
Trump falls short
 
Many strategists’ top worry