The new stocks app keeps on closing by itself

Solution 1:

You can try to cleanup/remove preferences etc.

  • Quit Stocks (in case it's still running)
  • wait a few seconds
  • Open Terminal
  • Run the following by copy/pasting it into Terminal and pressing Enter

    rm -r ~/Library/{Group\ ,}Containers/com.apple.stocks
    rm -r ~/Library/Saved\ Application\ State/com.apple.stocks.savedState
    
  • Run Stocks again

PS: You might get an error ...Library/Group Containers/com.apple.stocks: No such file or directory which you can ignore (don't have the file on my Mac, but Stocks tries to access it).