S&P 500 rises as investors await possible Iran and U.S. ceasefire: Live updates  CNBCDow Gains on Hopes for Iran Peace Talks  barrons.comStock market today: US stocks rise, oil falls as hopes emerge for an end to Middle East hostilities  Yahoo FinanceStock Market Today: Major Indexes Rise After Winning Week as Investors Assess Iran Developments  InvestopediaWall Street edges higher as investors assess Iran resolution prospects  The Detroit News