No - FDIC insurance applies specifically to banks and bank deposits. Your Personal Portfolio is an investment brokerage account that will be subject to market fluctuations.
Customer securities accounts at a custodian are protected by the Securities Investor Protection Corporation ("SIPC"), which protects consumers against the failure of a broker dealer.
For more information about SIPC and answers to frequently asked questions (such as how SIPC works, what is protected, how to file a claim, etc.), please refer to the following websites: