The final hour of the day, the triple-witching hour, can sometimes result in a less liquid market for certain securities. That can increase spreads and give savvy traders the opportunity to trade ...

It's a little bit funny, especially after the fact. One Golden Retriever mom calls this the "Witching Hour," and judging by the video she posted on Tuesday, March 18th, she's exactly right.

In modern trading, triple witching happens on the third Friday of March, June, September, and December (the last month of each quarter). In the U.S. stock market, the last hour of the trading day ...