 Theres a finely-balanced interplay in markets right now: rising yields sap stocks and the bond market is volatile. Today yields have risen on the back of oil, which jumped after the Keystone pipeline was shutdown due to a spill.In turn, a 0.5 rise in US equity futures was initially halved but were not at that level with the SP 500 up 21 points.However if stocks continue to fall the dollar catches a bid and the rally in commodities reverses. That creates a push-and-pull that... 