Hello Alan,
I understand you are experiencing issues with the Excel 365 STOCKHISTORY function and I appreciate you bringing this to our attention I know how frustrating it can be when a feature you rely on suddenly stops working, especially when you need timely stock data for your work. The reason this is happening is that the STOCKHISTORY function depends on online services to retrieve financial data and at times the server may encounter temporary problems or your internet connection may affect its performance.
The resolution is usually to wait for the service to stabilize, ensure your Excel is updated to the latest version and confirm that your internet connection is stable. In some cases, restarting Excel or checking Microsoft’s service status page can help confirm if the issue is on their end.
Could you let me know if the problem persists after updating Excel and verifying your connection?
I hope this answer is helpful if you have further questions feel free to reply back
Regards,
Marcelo