Good morning, Boston. Here are the five things you need to know in local business news to start your busy Tuesday.

Today, we update one of our favorite charts ... As we detail below, the market rules, trading economics, and how orders are handed by brokers, means each pie actually works quite differently ...

For the first time in over a year, the U.S. stock market is in a correction. The question now is whether the slide is set to get worse.