According to FINRA, Interactive Brokers LLC was censured and fined $125,000 for failing to provide required disclosures to customers purchasing municipal bonds trading at a market discount.

The Greenwich, Connecticut firm failed to establish and maintain a supervisory system reasonably designed to achieve compliance with its obligation to provide time of trade disclosures regarding municipal bonds traded at a market discount. Specifically, the firm was required to disclose that all or a portion of the investor's investment return represented by accretion of the market discount might be taxable as ordinary income rather than as capital gains.

Although the firm used a third-party vendor to provide time of trade disclosures, the firm's written procedures did not specify how it would supervise this vendor. The firm did not have any process to verify that purchasers of bonds with non-de minimis market discounts received adequate disclosures.

FINRA found that the firm failed to disclose non-de minimis market discounts in transactions involving customers with a total principal value of approximately $40 million. The tax implications of this failure are significant, as the difference between ordinary income tax rates and capital gains tax rates can substantially affect an investor's after-tax return.

Following the discovery of these deficiencies, the firm provided the required disclosures to impacted customers and offered to compensate them for demonstrated adverse tax consequences resulting from the belated disclosures. The firm and its third-party vendor implemented an automated notification requiring customers to acknowledge the potential tax consequences before completing transactions.

This case highlights the importance of proper disclosure in municipal bond transactions. Investors should understand that bonds purchased at a market discount may have different tax treatment than expected, and firms have an obligation to clearly communicate these tax implications at the time of trade.