While indicators are positive for now, here's what may go wrong with the economy in 2020

The current economic expansion shows no obvious signs of stalling. Economists in general expect 2020 will see another year of growth, even if not quite so robust as in 2019. That should usher in a decent year for the stock market, especially as presidential election years tend to be upbeat.

But while a recession appears to be at least a year away, things could unravel quickly.

"In spite of record-low unemployment and continued steady, if unspectacular growth, the economy seems fragile," Lee McPheters, an economics professor at Arizona State University, said.

Here are some contrarian, negative signs — perhaps even bubbles — to beware amid what is still broadly considered to be a generally upbeat backdrop.

Student loan debt: Strategies to pay it off faster, smarter

Are your bank deposits safe? Potential problems could be brewing

Maxed-out consumers

Consumer spending drives more than two-thirds of the economy, so if average Americans are buoyant, that's a good sign. That describes the current situation, with continuing high consumer-sentiment readings and solid holiday-seasons sales.

But there are pockets of weakness. "Personal debt is where the heart of my concern lies," Jonathan Smoke, chief economist for Cox Enterprises in Atlanta, said.

Many low-income individuals, those with poor credit and younger adults are grappling to make ends meet even after a decade of economic growth. Renters are getting squeezed by higher rents, and auto-loan delinquencies and defaults are ticking higher — which partly explains sluggish new vehicle-sales.

Auto-loan delinquencies for subprime borrowers already are at a higher level than at any point leading up to and including the Great Recession, Smoke said. Rising delinquencies and defaults could lead to more personal bankruptcies, he added.

Smoke also sees a lot of Americans going overboard on holiday spending this season. Many will require income-tax refunds early next year to dig out of their holes, he said.

Foreign trade and a global slowdown

The threat of disruptive trade disputes has eased in recent weeks, with the U.S. House of Representatives passage of a new trade agreement with Mexico and Canada, and with word that the White House and China have agreed to ease tariffs.

Still, in a survey released in December by the Blue Chip Economic Indicators newsletter, member economists ranked trade disputes with China as easily the most worrisome peril, ahead of weaker corporate profits, a general global slowdown and other threats.

Though exports and imports are less vital to the U.S. than they are to China, Europe and most other nations, trade friction and slower global growth pose risks here too. That's partly owning to broadening of the global supply chain, McPheters said.