The stock market is in choppy waters as the Iran war extends into its third week, but the shake-up is shedding light on some emerging opportunities, Goldman Sachs said. In a note to clients on Friday, strategists at the bank pointed to the recent stock-market volatility stemming from the US-Iran war, and said they saw continued "downside risk" for the index going forward. That's because valuations in the S&P 500 are already high, and there's a risk that elevated oil prices could further pressure the marke ...