Hope of hostilities easing between the US and Iran are fading quickly with neither side backing down or saying it's time for new negotiations. The conflict also faces a fresh threat of escalation as Iran-backed Houthis claimed their first attack on commercial ships in recent months. Investors and central banks are now confronting the possibility that the attack could effectively close another maritime chokepoint vital to energy markets. The Opening Trade spoke to guests about what the rebound in oil prices could mean for companies as Europe stares down the barrel of dwindling gas supplies.