Stock market today: Dow, S&P 500, Nasdaq slide amid US-Iran peace talk uncertainty Yahoo FinanceStocks slip and oil prices rise on uncertainty about US-Iran ceasefire talks AP NewsTrump Just Extended the Iran Ceasefire. Here’s What It Means for Investors Yahoo FinanceStocks close lower as Iran ceasefire deadline looms amid threat of canceled talks CNBCUS Stock Futures Rise as Trump Extends Iran Truce: Markets Wrap Bloomberg.com