The approval of perpetual futures contracts in the US may expose traders to unforeseen tax and regulatory uncertainty if these products are ultimately deemed to be swaps rather than futures, a concern expressed by CME Group Chairman and CEO Terry Duffy. In an interview, Duffy noted that there is ambiguity from a tax perspective for all US participants due to the lack of clarity on the classification of perpetual futures.

This ambiguity stems from the periodic funding payments exchanged between long and short positions in perpetual contracts, which Duffy argues should legally be treated as swaps under US law due to these recurring payment exchanges. Unlike traditional futures, perpetual contracts do not expire and instead involve periodic funding payments to keep the derivative's price close to the underlying asset's price. Duffy's concern is that if perpetual contracts are classified as futures, many institutional traders may receive a blended tax treatment, but if they are classified as swaps, they will be taxed under ordinary taxation. However, the IRS has not provided specific guidance on the tax treatment of perpetual futures, leaving market participants uncertain about how to report these positions.

Legal experts agree that the issue is complex, with the definition of swaps being extremely broad and the economic function of perpetual futures resembling that of traditional futures. The outcome of the court case and potential IRS guidance will be crucial in determining the tax treatment of perpetual futures, with significant implications for market participants.