The core factual claim is supported by Reuters: 'Pakistan seeks two-week ceasefire, extension to Trump's deadline on Iran | Reuters' says Pakistan asked Trump for a two-week extension and that Tehran was positively reviewing the request, with Trump aware of it. 'U.S. and Iran reach 2-week ceasefire ahead of Trump's deadline' from CBS independently aligns with the existence of Pakistan-mediated talks and a two-week arrangement around the deadline. The exact market wording that the 'S&P 500 turns positive' is not directly verified from a primary market data source in this run, though CBS says markets reacted positively and S&P 500 futures indicated gains. So the post’s main geopolitical assertion is well supported, while the specific market phrasing is only partially corroborated.