What is the Sahm rule and why does it matter?

Mike Armstrong and Marc Fandetti discuss the wild 24 hours on markets that saw huge losses turn into stunning gains for some. The guys explain what the Sahm Rule is and why it is referred to by economists when trying to predict a recession. How is the presidential race impacting markets? Did the market selloff upend the Fed's rate-cut plans? Should the Fed resist placating markets?