Do celebrities really die in three? Actor Malcom-Jamal Warner, singer Ozzy Osbourne and professional wrestler Hulk Hogan died in late July, prompting Google search around the “rule of three” to spike.

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 ...

The 80/50 rule helps investors spot potential turning points in silver prices, which could be useful right now.

You can violate the pattern day trader (PDT) rules without realizing it. The consequences for violating PDT vary, but can be inconvenient for investors who are not actively trading. For active ...

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 ...

My mom tells a story from long ago when I was very young — barely 3 or 4 years old. My grandfather asked me what I hoped to learn at preschool. “Three things,” I replied. “How to read, how to play the ...

The term refers to the persistent notion that celebrity deaths come in threes. The “30 Rock” episode “Stone Mountain” riffs on the idea by making Tracy Jordan fear for his life after he learns two ...