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TMX Group's $800-Million MEMX Purchase Isn't Diversification, It's a Strategic Retreat from Canada
TMX Group just committed nearly a billion dollars to buy control of an exchange that holds roughly 3% of U.S. equity market share. MEMX, Members Exchange, launched in 2019 as Wall Street's attempt to build a cheaper alternative to the NYSE and Nasdaq duopoly. It's grown, but slowly. Its options platform, added in late 2023, has momentum in derivatives trading, where retail volume in zero-day-expiration contracts has exploded. But the equity business is a grind: sixteen active U.S. exchanges fighting over basis points, and MEMX is the scrappy newcomer with single-digit share.
The deal makes sense if you believe TMX's stated thesis: that data revenue matters more than trading fees, that MEMX gives them access to high-margin U.S. market data feeds they can bundle with Canadian proprietary content, and that being a "North American exchange operator" is worth the execution risk of integrating a modern, high-frequency U.S. platform with a legacy Canadian one.
What the thesis doesn't explain
TMX already derives roughly 40% of its revenue from outside Canada. Most of that comes from information services and technology sales, the kinds of businesses that don't require owning an exchange in another country. If the goal was really data diversification, they could have expanded those offerings without writing an $800-million cheque to take majority control of a business that still has to claw market share from entrenched giants every single day.
The deal reads less like expansion and more like exit velocity. Canadian capital markets have a liquidity problem. Volumes on the TSX Venture Exchange are anaemic. Institutional investors routinely complain that junior resource companies and small-cap tech names can't get serious attention in Toronto because the depth simply isn't there. That's not a new complaint. It's been true for a decade. What's new is TMX leadership deciding the problem isn't worth solving domestically.
The options bet is real, but risky
Where MEMX has genuine traction is derivatives. The U.S. options market regularly clears over 40 million contracts a day, and retail traders, especially those chasing 0DTE strategies, have turned the space into a volume machine. MEMX's options platform launched late and small, but it's growing fast in a segment where even a few percentage points of share can generate serious revenue.
That part of the deal makes tactical sense. The problem is the equity side, which is structurally unprofitable unless you achieve scale that MEMX has not yet demonstrated it can reach. Exchange technology has massive fixed costs. Revenue per trade is falling across the industry. The only way the arithmetic works is if you either dominate a niche or operate at a scale where those fixed costs get spread thin. MEMX is trying to do the second thing while still being small. TMX is now funding that experiment with Canadian shareholder capital.
Regulatory scrutiny will not be light
The SEC has spent the last eighteen months raising questions about exchange consolidation, market data pricing, and whether smaller broker-dealers are getting fair access to liquidity. MEMX was founded by major broker-dealers, Virtu, Citadel Securities, Charles Schwab, as a "pro-customer" alternative. That origin story bought it goodwill. A foreign exchange operator taking majority control changes the optics. The deal requires SEC approval. It will get it, probably. But the process will surface questions about whether TMX plans to keep MEMX's founding principles or absorb it into a broader global data-extraction strategy.
Back in Canada, the real question is what happens next. TMX is now a company that generates nearly half its revenue outside the country, led by executives who just decided the highest-return use of capital was buying into the most fragmented, lowest-margin equity market in the developed world. That's fine if your shareholders care about global scale. It's a problem if they expected you to fix the liquidity issues at home first.
TMX Group just committed nearly a billion dollars to buy control of an exchange that holds roughly 3% of U.S. equity market share. MEMX, Members Exchange, launched in 2019 as Wall Street's attempt to build a cheaper alternative to the NYSE and Nasdaq duopoly. It's grown, but slowly. Its options platform, added in late 2023, has momentum in derivatives trading, where retail volume in zero-day-expiration contracts has exploded. But the equity business is a grind: sixteen active U.S. exchanges fighting over basis points, and MEMX is the scrappy newcomer with single-digit share.
The deal makes sense if you believe TMX's stated thesis: that data revenue matters more than trading fees, that MEMX gives them access to high-margin U.S. market data feeds they can bundle with Canadian proprietary content, and that being a "North American exchange operator" is worth the execution risk of integrating a modern, high-frequency U.S. platform with a legacy Canadian one.
What the thesis doesn't explain
TMX already derives roughly 40% of its revenue from outside Canada. Most of that comes from information services and technology sales, the kinds of businesses that don't require owning an exchange in another country. If the goal was really data diversification, they could have expanded those offerings without writing an $800-million cheque to take majority control of a business that still has to claw market share from entrenched giants every single day.
The deal reads less like expansion and more like exit velocity. Canadian capital markets have a liquidity problem. Volumes on the TSX Venture Exchange are anaemic. Institutional investors routinely complain that junior resource companies and small-cap tech names can't get serious attention in Toronto because the depth simply isn't there. That's not a new complaint. It's been true for a decade. What's new is TMX leadership deciding the problem isn't worth solving domestically.
The options bet is real, but risky
Where MEMX has genuine traction is derivatives. The U.S. options market regularly clears over 40 million contracts a day, and retail traders, especially those chasing 0DTE strategies, have turned the space into a volume machine. MEMX's options platform launched late and small, but it's growing fast in a segment where even a few percentage points of share can generate serious revenue.
That part of the deal makes tactical sense. The problem is the equity side, which is structurally unprofitable unless you achieve scale that MEMX has not yet demonstrated it can reach. Exchange technology has massive fixed costs. Revenue per trade is falling across the industry. The only way the arithmetic works is if you either dominate a niche or operate at a scale where those fixed costs get spread thin. MEMX is trying to do the second thing while still being small. TMX is now funding that experiment with Canadian shareholder capital.
Regulatory scrutiny will not be light
The SEC has spent the last eighteen months raising questions about exchange consolidation, market data pricing, and whether smaller broker-dealers are getting fair access to liquidity. MEMX was founded by major broker-dealers, Virtu, Citadel Securities, Charles Schwab, as a "pro-customer" alternative. That origin story bought it goodwill. A foreign exchange operator taking majority control changes the optics. The deal requires SEC approval. It will get it, probably. But the process will surface questions about whether TMX plans to keep MEMX's founding principles or absorb it into a broader global data-extraction strategy.
Back in Canada, the real question is what happens next. TMX is now a company that generates nearly half its revenue outside the country, led by executives who just decided the highest-return use of capital was buying into the most fragmented, lowest-margin equity market in the developed world. That's fine if your shareholders care about global scale. It's a problem if they expected you to fix the liquidity issues at home first.
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