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 Interactive Brokers LLC 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: