What could make oil tank again, a rising dollar DXY . DXY wants to go higher form here. What could cause that, how about a "hawkish tone" from Yellen tomorrow. How about more than that, a prep talk for a rate increase right after the election in December, if the data proves to keep supporting that, i.e. strong numbers yet again, with a topping of rising wages, all to fed off . This would cause a few down days on the markets, but banks would love it, so no collapse, which is what Yellen is counting on. Her safety net here is an overvalued market. Why not take some profits off this over heated market. Short here is oil , long dollar.