This is a companion skill for your Sharesight account. It requires that you first set things up at sharesight.com. Once you have created a Sharesight account, enabled the skill and linked your Sharesight account via the Alexa app, you're ready to go.
To check your portfolio details, you can say something like "Alexa, ask share sight how my shares are doing" or "Alexa, ask share sight to list my portfolio details".
To get started, we'll ask you to securely sign in with your Sharesight email and password. You can revoke this access at any time from the "Account Settings" page.
This is a third party solution that uses the excellent Sharesight API.