Powell was reading an exchange on risk taking

In his Q&A, Fed chair Powell said he was on twitter on the weekend and reading an exchange between economists on low rates, benign volatility and higher risk taking.

It's not 100% clear exactly what he was talking about but it was likely this post from former IMF chief economist Olivier Blanchard. That set off a conversation with former Fed Governor Jeremy Stein, among others. You can read it here.

There's nothing ground-breaking there but it shows how the Fed is keeping tabs on the main-stream arguments and monitoring what people are talking about.