Two Factor Auth (2FA)

Fidelity Investments
Info regarding Fidelity's 2FA.

For authentication, Fidelity uses either a physical token provided by Fidelity or the Symantec VIP Access smartphone app.
Fidelity only offers 2FA on certain account types. For example, they do not support it for institutional retirement accounts of the kind that might be set up through an employer.
It appears there is no information about this service provided online and it must be enabled and managed by phone.

As of October 2016, Fidelity also offers two-factor authorization, whereby customers may receive an authorization code before performing certain actions. According to Fidelity's documentation:

You will get a security code to verify your identity when you perform highly sensitive transactions such as setting up new bankwire instructions or changing our contact information.
Note on Security

That this is different than the weaker "Transaction Security", which only protects certain types of transactions.

How to Setup 2FA for Fidelity

  1. Do one of the following:
    1. Obtain a physical token by calling Fidelity Account Key Support at +1 800-544-6666.
    2. Install the Symantec VIP Access app for iPhone or the Android version.
  2. Get the Credential ID from the token or app.
  3. Call Fidelity Account Key Support at +1 800-544-6666.
  4. Ask them to add two-factor authentication to your account. You will need to provide the Credential ID.
  5. The next time you log in to the Fidelity website it will prompt you for the temporary security code from the token or the app.