Every few days for the last month or so I've been refreshing a Federal Reserve page that shows data about daylight overdrafts. For some reason the Fed only updates it every few months. I had been getting quite curious to see what happened during the great September interest rate spike. Well, finally the Fed has uploaded the data. If you don't know about the September rate spike, I'd suggest reading Nathan Tankus's tweet , listening to David Beckworth's podcast with Bill Nelson, or picking through this blog post from Stephen Cecchetti and Kermit Schoenholtz. In short, there was a sudden increase in the demand for Fed balances (also known as reserves), and the Fed was slow to react by increasing the supply of balances. And so the rate at which banks were willing to borrow balances spiked to desperation levels. Why did the demand for balances increase? That's where daylight overdrafts can inform us. By way of background, the Fed has had a long-standing policy of...