CNBC Daily Open: U.S.-Iran ceasefire set to expire

* US-Iran ceasefire expires amid stalled talks over Strait of Hormuz * US oil reserves hit lowest since 1980s, risking storage damage * JPMorgan may become first $1 trillion bank; European stocks resilient The US-Iran ceasefire expires today with talks stalled. Iran seeks Oman deal to reopen Strait of Hormuz. US oil reserves fell below 300M barrels, risking cavern damage. Japan Q2 GDP missed forecasts; China data delayed. JPMorgan could hit $1T market cap. European stocks resilient despite growth concerns.