You have probably heard about data breaches in the news, but you may not have considered how they relate to your own online security. If you're reusing your Fidelity username or password for social media sites or your other online accounts, and any of these accounts are breached, your Fidelity account could also be at risk. If hackers get this information, they can easily identify multiple places and ways to use it. Reusing passwords is never a good idea. Make sure to use different, unique passwords for all of your accounts and change your passwords periodically.