Guess what her day job is... that's right, she's a blogger.
I have always thought that looking at stock market indices is a bad way to gauge economic health. Most of the time, the market drops if it things a Democrat is going to win and goes up when it thinks a Republican is going to win. Then over the tenure it flips, because the D president isn't as bad as expected and the R president isn't as good as expected.
A far better measure might be things like unemployment that includes those that have stopped looking or are underemployed.