A Commodity Futures Trading Commission roundtable in Washington, D.C. turned heated on Thursday when Terry Duffy and Luana Lopes Lara clashed over how prediction markets should be overseen.
The exchange came during a CFTC meeting that brought together executives from traditional finance, crypto and prediction markets, and it quickly became a sharp public debate about market manipulation, regulation and who gets to define credible trading venues.
Duffy pushes back on prediction markets
Duffy, the CME Group chairman, said he was “a lot concerned” about prediction markets and argued that some contracts are vulnerable to manipulation. He also stressed that CME Group operates the world's largest futures exchange by volume and rejected the idea that the firms involved should be treated casually.
“We’re not a bunch of carnival barkers at a circus,” Duffy said, adding, “We are running the most envious markets in the world in the United States of America.” When the discussion intensified, he told Lara, “If you'd like to have a debate, I'm happy to have a debate with you,” and later said, “I have more people in my regulatory department than you have in your whole company.”
Lara answers back
Lara said she spoke up because her company had been mentioned directly. “I just wanted to respond since we were called by name here,” she said. She then challenged Duffy by asking, “Has CME ever had any issues with any market manipulation, any issues ever in its history?”
The back-and-forth continued from there. Lara said, “Maybe you should learn a bit about efficiency then,” and Duffy replied, “Well, maybe you should learn about credible markets.”
Lara argued that risk exists in every market, including newer ones, and said regulation is the mechanism for finding and fixing problems. “Every market has risk and every nascent market will have risks as well, and there have been issues in every single traditional market and every single exchange here, onshore and offshore,” she said. “And I think the point of having regulation is that you find these issues, you address these issues, and there's a way to address them in a correct way.”
Why it matters
The confrontation reflects a broader debate over how event contracts should be regulated. As prediction markets continue to draw attention, the fight between established exchange operators and newer platforms is likely to stay in the spotlight, especially when regulators gather to discuss oversight in public.







