It matters because it matters to people. It's completely arbitrary, but sometimes humans just work that way. Like it or not, there are going to be individuals w

It matters because it matters to people. It's completely arbitrary, but sometimes humans just work that way. Like it or not, there are going to be individuals watching the nightly news tonight and will hear about the Dow crossing 16,000, and they will think "Wow, it's going up, I need to get in on this," and/or it will affect their confidence as consumers going into an important time of year for consumer spending.