Violating the pattern day trading rule can be a costly mistake for active investors. For the uninitiated, it can result in trading restrictions or a locked account. And when that happens, any holdings ...

According to Financial Industry Regulatory Authority (FINRA), a pattern day trader (PDT) is someone who trades at least four times over the course of five business days and their day trading exceeds ...

For more than two decades, one single number has quietly defined who actively trades in U.S. markets: $25,000. That’s the minimum equity a retail investor must maintain to freely day trade under the ...

A bizarre "Rule of Four" has been identified in the basic structure of the majority of inorganic materials—and scientists are stumped as to why. The pattern is found in the so-called "unit cell" of ...