Macro 'is getting a bit of a gut check today,' says Charles Schwab's Joe Mazzola, pointing to a steady climb in crude oil prices and Treasury yields as key drivers. He warns investors of a low VIX as something to mind amid all the geopolitical uncertainty and suggests hedging strategies as a way to protect portfolios. Joe tells investors to mind the S&P 500 (SPX) as well, believing a push below current levels will lead to a further flush.