10月24日隔夜要闻：美股三大指数收跌 油价大涨 金价下跌 特朗普称可能对伊发动一次小规模“史诗怒火”行动

English version

What happened

In overnight trading on 24 October, the three main US stock indices fell, with the Dow down more than 600 points; Brent crude rose to its highest level since April, gold fell, and the market sell-off widened.

The economics

A sharp oil-price rise driven by Middle East tensions is a classic supply shock: higher energy costs raise firms' production costs and can feed through into consumer prices, creating cost-push inflationary pressure. The simultaneous equity sell-off and moves in safe-haven assets show financial markets repricing risk, so students can trace a leftward shift of the supply curve through to lower equity valuations.

Figures to quote

• Dow down more than 600 points
• TSMC up 1.49%

Evaluation

The effect of a supply shock on inflation and output depends on how long it lasts and how the central bank responds; a short-run oil spike need not become persistent inflation, and the winners and losers differ across industries and between oil-importing and oil-exporting countries.

Practice question

Using the material, analyse the macroeconomic effects of a sharp rise in international oil prices, and evaluate how monetary policy should respond to such a supply shock.