Live: S&P 500 posts back-to-back winning days as chips rally and oil prices slide [https://www.cnbc.com/2026/10/26/stock-market-today-live-updates.html?__source=iosappshare%7Ccom.apple.UIKit.activity.CopyToPasteboard](https://www.cnbc.com/2026/10/26/stock-market-today-live-updates.html?__source=iosappshare%7Ccom.apple.UIKit.activity.CopyToPasteboard)