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Use the same Stocks watchlist on your Mac, iPhone and iPad
Use iCloud to view your Stocks watchlist on all your devices.
When you sign in with the same Apple ID on all your devices and turn on Stocks in iCloud preferences, the watchlist from your current device appears on your other devices.
On your Mac, choose Apple menu
Select iCloud in the sidebar.
Select Stocks in the list of apps.
To stop using iCloud with Stocks on your Mac, deselect Stocks in the list of apps.