This is where alternative facts fail

There’s a vigorous debate underway in America about whether facts matter. Here’s why they do and always will.

You might be able to win a Twitter battle with alternative facts, as President Trump has arguably demonstrated. Trump’s latest dubious assertion is that President Obama ordered the phones tapped at the Trump campaign’s headquarters last year. People who ought to know say that didn’t happen, but Trump seems to have used the self-generated controversy to deflect attention from criticism of his attorney general and other controversies. Don’t expect him to back down.

The use of alternative facts helped Trump win the presidential election last year, and as president he has continued to lie about nonexistent voter fraud, an escalating murder rate that’s actually declining, terrorist attacks that didn’t happen, the “biggest electoral college win since Ronald Reagan” (except for five others), and of course a record inauguration crowd that wasn’t.

These aren’t accidents or mistakes. Trump plainly believes he can say whatever he wants and his supporters won’t care. Trump defenders back that up, to some extent, saying it’s a mistake to interpret Trump literally. Instead, they praise Trump’s vow to dismantle the broken establishment and say his methods don’t really matter. Trump, for his part, seems to realize that every public lie he utters intensifies his conflict with the know-it-all fact-checkers in the media, which boosts his standing among core supporters who view the media as part of the problem.

Fact-defenders are tearing their hair out in the Trump era, but they will prevail, because there’s one part of our socioeconomic life where fake facts don’t cut it: the market. You can’t lie your way to prosperity, at least not legally, and you’ll actually harm your well-being if you make important decisions about your economic life based on bogus propaganda. This is happening now.

Experienced investors know that asset prices can, in fact, rise on hype, deception and wishful thinking. But the market always corrects for this, often in profound and disastrous ways. It even overcorrects sometimes. The housing bubble of the early 2000s ended in the devastating financial crash of 2008. Oil prices soared above $100 per barrel in 2014, before the market noticed all the new supply coming online from US shale, sending prices down by 75% and causing widespread hardship in the energy industry.

The stock market may even now be overestimating the eventual impact of tax cuts, deregulation and other business-friendly moves Trump has promised. Trump has clearly talked up stocks, highlighting investors’ susceptibility to a good story. But sugar highs are always temporary, and the story can change quickly once the storyteller loses credibility.