if the United Sates or Is-re-al attack I-ran? My stupid uncle joey asked me ( yes, I was named after him and I hate it cause he is drunk A-LOT ) what the stock market would do if it happend and i told him I dunno but will ask you experts here. so will stock market go up or down? how bout oil...go up or down?
If they attack, Iran will try to mine the straight of Hormuz to cut off oil supplies. Regardless of whether that succeeds, the price of oil will spike. Instability in the middle east never leads to lower prices.