The Dow Jones Industrial Average erased a 370-point gain and turned red this afternoon, as investors appeared to abandon equities ahead of the long Labor Day weekend. This morning’s “Goldilocks” U.S. jobs report provided an initial lift on hope there was foundation for a 50 as opposed to a 75-basis-point rate hike when the Federal Open Market Committee meets September 20-21. And then there’s the crude oil question – as in, is that critical commodity getting ready for another run higher? With the G-7 discussing a price cap on Russian oil, Vladimir Putin saying he won’t sell to nations that agree to it, and Saudi Arabia weighing production cuts, Maggie Lake welcomes Warren Pies, the founder of 3Fourteen Research, to talk about "black gold," volatility, and things that could make what is, historically, the worst month for the stock market particularly catastrophic this year.