Explosions heard in Riyadh, Saudi capital, on evening of the 5th

The signal here is location, not detail: Riyadh sits at the centre of Gulf energy and capital flows, so any unexplained incident there carries outsized weight for regional risk sentiment even before a cause is known. With no confirmation of origin, target or casualties, markets have nothing concrete to price, which is itself the notable condition. The open question is whether an official account follows and whether it clarifies or compounds the ambiguity.