Quote from OldTrader:
I'd say this is an incorrect conclusion. The Lloyds policy is intended to insure that amount in excess of the $500K SIPC insurance. So to know what exactly the Lloyd's policy is insuring, you would need to know the number of accounts in excess of the SIPC limits, and their respective sizes. If your account is under the SIPC limits then the Lloyds policy is less important. But frankly given the information that we currently know, it's impossible to tell how any specific customer would benefit from the Lloyd's policy provided your account exceeds the SIPC limits. I'd say one of the most important concerns would be the financial stability of the firm itself, because if a firm it strong enough, insurance would tend to be less important.
OldTrader