Know Your Limits - FDIC
The Federal Deposit Insurance Corporation protects money deposited in banking institutions. Investment products are not insured by the FDIC. For example mutual funds, annuities, life insurance policies, stocks and bonds are all not covered under the FDIC.
FDIC Website - http://www.fdic.gov
Know your Limits - SIPC
The Securities Investor Protection Corporation (SIPC) covers cash and securities held by you at a brokerage firm. The protection is against fraud and loss of the actual securities. SIPC will step in where those securities you own are lost or misappropriated from a brokerage account.
SIPC Website - http://www.sipc.org