Yemen says any country that sides with Saudi Arabia is an aggressor, Fars reports

The sourcing matters: Fars is an Iranian state-linked outlet, so the framing says as much about Tehran's posture toward the Saudi camp as it does about Yemeni intent, and proxy-channel signalling of this sort has typically been followed either by calibrated strikes or by quiet de-escalation once the message lands. The transmission channel to markets in comparable episodes has run through Gulf crude infrastructure and Red Sea shipping, with freight and war-risk insurance repricing before outright supply loss is demonstrated; rhetoric alone has tended to fade unless matched by an actual attack. The tell is operational rather than verbal: whether shipping advisories, coalition responses, or Saudi air-defence activity follow. Absent that, past instances of similar declarations have produced limited durable market effect.