The Stocks app is a great experience for following all your current stocks, but Apple only has a select few added when you first open the app. So here’s how to add a stock in the stocks app.
How to Add a Stock to the Watchlist in the Stocks App

1) Launch Stocks.

2) Click Edit.

3) Click the “+”.

4) Type the name of a Stock.

5) Click Add To Watchlist.