On September 16, 1992, Britain tried to defend a currency level the market no longer believed in. The pound was inside the European Exchange Rate Mechanism (ERM), which required Britain to keep sterling within an agreed range against other European currencies. But the UK economy was weak. German interest rates were high. And defending the pound increasingly conflicted with what Britain needed domestically. Then came Black Wednesday. Britain raised its minimum lending rate from 10% to 12%. It announced another increase to 15% for the following day. That 15% rate was never implemented. By that evening, after heavy official intervention failed to lift sterling from its ERM floor, Britain suspended the pound’s ERM membership. George Soros later revealed that he had bet roughly $10 billion against the pound and made nearly $1 billion when Britain abandoned the defense. But the interesting lesson isn’t “Soros shorted the pound.” It’s this He wasn’t simply betting that a currency would fall. He was betting that the policy defending the currency had become unsustainable. That’s a different way to think about markets. Sometimes the important question isn’t Where is price going? It’s “What has to remain true for this price to stay where it is?” Because when a market price depends on a policy, peg, intervention or commitment… the real trade may be in the credibility of that commitment. That is where macro trading gets interesting. Price is the visible number. The policy behind the price can be the real trade.