Economic models assume humans make rational choices, but University of Chicago economist Richard Thaler isn’t having any of it. With wild swings in the market this month, investors and their rationality have never been tested more.

Q: We’re hearing a lot about Bitcoin lately. Are we missing out on something big? Should we own Bitcoin?
A: In a word, no.

In a widely publicized bet with hedge fund manager Ted Seides, Warren Buffett wagered $1 million in 2008 that Vanguard’s S&P 500 Index Fund would deliver better returns over a ten-year period than hedge funds handpicked by Seides. The results of Buffett’s bet are in, and guess who’s doing the happy dance?

While it is too soon to grasp the full implications of the new tax law—the first significant revision to U.S. tax law since 1986—individuals and corporations will be affected by the changes starting this year. Here are some of the key changes that will go into effect.

“This could be the year,” predicted Barron’s in January, “the movie runs backward. Inflation awakens. Bond yields reboot. Stocks stumble. Active management rules.” Or maybe not.