 All right, really quickly, I'll try. So it's our best recession indicator. And basically, it means that the unemployment rate has gone up at least half a percentage point in the past year. And it makes intuitive sense, right? When you start to see people losing their jobs, even just a few, they pull back on spending. And then usually more people start losing their jobs and more pull back on spending. And so that's why the SAM rule has been so effective over time at predicting and codifying recessions.