Live: S&P 500 closes near flat after big banks post earnings and memory chip stocks decline [https://www.cnbc.com/2026/10/12/stock-market-today-live-updates.html?__source=iosappshare%7Ccom.apple.UIKit.activity.CopyToPasteboard](https://www.cnbc.com/2026/10/12/stock-market-today-live-updates.html?__source=iosappshare%7Ccom.apple.UIKit.activity.CopyToPasteboard)