Overview of Key Developments Overnight on April 16

21:00 (UTC+8) - 7:00 Keywords: Hilbert, S&P 500, US-Iran negotiations, Lebanon1. Hassett: Alternative tariff plans are basically ready;2. AI startup Hilbert completes $28 million Series A financing;3. The S&P 500 Index hits its first historical high since the Iran war;4. Iranian Foreign Ministry spokesperson: It cannot be confirmed whether the US and Iran will extend the ceasefire;5. Israeli military sets three basic conditions for reaching a ceasefire agreement with Lebanon;6. Pakistani delegation arrives in Iran to discuss the second round of US-Iran negotiations;7. US media: Progress has been made in US-Iran negotiations, and a framework agreement to end the war is gradually being reached.