The founder who trades billions, then goes home to feed the chickens.
Christina Qi runs Databento, an on-demand market-data platform used by quants, asset managers, and students who could never before afford the numbers Wall Street hoards. The pitch is a food metaphor she likes: instead of buying the whole grocery store, you buy the bento box you actually want for dinner. Pay-as-you-go. No long-term commitment. The kind of thing that sounds obvious right up until you learn how nobody in finance was offering it.
She knows the gap firsthand, because she spent a decade on the other side of it. Before Databento there was Domeyard LP, a high-frequency trading fund she co-founded in 2012 while still an undergraduate at MIT. It began with about $1,000 in savings and two co-founders crammed into a dorm. It ended as one of the longest-running HFT funds in the world, at peak trading up to $7.1 billion in a single day.
The name is a small joke that stuck: Domeyard, from the MIT Dome and Harvard Yard, the two campuses the founders came from. It took three years to actually launch. It became a Harvard Business School case study. And then, after roughly ten years, Qi wound it down - gracefully, on her own terms, at a moment when plenty of people would have kept riding.
That decision is the hinge of her whole story. She had the money and lost the point of it. So she took the most expensive frustration of her hedge-fund years - millions wasted on unreliable market data - and turned it into a company built to make sure nobody else had to pay that tax.
Good ideas come from poor experiences. - Christina Qi
A rough internship, then a decision most people talk themselves out of.
Qi grew up in Utah in a household that leaned on welfare - a detail she doesn't hide, and one that makes the arc of her career read less like luck and more like nerve. She has described a difficult experience during an internship as the shove that pushed her toward starting something of her own rather than fitting into someone else's machine.
What she and her co-founders built was not a lifestyle business. High-frequency trading is a brutally technical arena, and they were undergraduates trying to compete with firms that had entire floors of engineers. Along the way she picked up experience across Goldman Sachs, UBS Securities, Zions Bank, and MIT Lincoln Labs, then earned a CAIA charter in 2015. The launch alone took three years. When Michael Lewis's Flash Boys made HFT a public villain in 2014, the whole industry ducked for cover - and Domeyard, being young and visible, found itself blinking in a spotlight it never asked for.
Then there was the FBI. Qi has recounted being escorted into a dark room and questioned, lie detector and all, about one of the fund's investors. It is the sort of anecdote that would flatten most careers into a cautionary tale. She files it under the cost of doing business in a world she was still learning the rules of, and later put it in a memoir about the whole strange ride.
Build the thing. Then build the thing that fixes the first thing.
Domeyard LP
A high-frequency trading hedge fund born in an MIT dorm and named for two campuses. It scaled to trade billions a day and survived a decade of markets, a media backlash, and an FBI interrogation. When its strategies met rising headwinds in scalability and cost, Qi chose to wind it down with dignity rather than let it limp - and turned the entire saga into a Harvard case study.
Databento
The answer to Domeyard's most expensive problem. Financial data is famously hard and pricey to access; Databento makes institutional-grade, full-order-book market data available on demand, self-service, pay-as-you-go. The customer she cares about most isn't the whale - it's the student or small firm that used to be priced out entirely.
Instead of buying the whole grocery store, you can just buy a bento box for dinner - something consumable that you really want. - Christina Qi, on the name Databento
Winning, and losing the plot.
By any Wall Street scoreboard, Domeyard was a success. Qi has been candid that success is exactly where the trouble started. Eight-odd years in, she found herself in what she describes as cognitive dissonance - technically excellent work whose main effect was, in her own blunt phrasing, making the world's billionaires a little richer. The numbers went up. The meaning drained out.
So she did the unglamorous, counter-instinctive thing. She stepped back, wound the fund down, and pointed her considerable pattern-recognition at a problem with a bigger blast radius: access. If bad, expensive data had cost her fund millions and years, then fixing data wasn't a side quest - it was the whole game for everyone coming up behind her.
She talks about decisions in a way that betrays both halves of her brain. There's the quant who wants the monetary value modeled cold, and there's the founder who insists on weighing the societal impact and the gut feeling too. Sometimes, she says, an idea passes every technical test and still just doesn't feel right - and she's learned to trust that flinch.
The through-line is a sentence she repeats to students: there's more to life than achieving alpha. You can chase alpha at all costs, and technically win, and pay for it with everything else. Coming from someone who actually did the chasing, it lands harder than a motivational poster.
Twelve years, two companies, one throughline.
- 2012Co-founds Domeyard LP from an MIT dorm with ~$1,000 and two partners.
- 2013Graduates MIT with a B.S. in Management Science; begins lecturing on campus.
- 2014Guest-lectures in Nobel laureate Robert Merton's Retirement Finance course.
- 2015Domeyard fully launches after three years of build-out; earns her CAIA charter.
- 2019Co-founds Databento to fix the market-data problem she hit at Domeyard.
- 2021Writes a memoir about the fund, the FBI, and life among finance's biggest names.
- 2022Winds down Domeyard after roughly a decade, on her own terms.
- 2024Databento reports a Series A raise as its self-service platform scales.
- 2025Receives the UBS Female Founder Award for her work at Databento.
Honors, boards, and a case study about her own company.
Forbes 30 Under 30
Named to the list early - and now sits on the Forbes 30 Under 30 board, on the other side of the table.
UBS Female Founder
The 2025 UBS Female Founder Award, recognizing her work democratizing market data at Databento.
MIT Corporation
A member of MIT's Board of Trustees and its Development Committee, giving back to the campus that launched her.
Invest in Girls
Co-Chair of the board, bringing financial literacy education to underserved students across the U.S.
Harvard Case Study
Domeyard is taught at Harvard Business School - she guest-lectures on the rise and wind-down of her own fund.
Front-Page Fixture
Featured on the front pages of Forbes and Nikkei; quoted by WSJ, Bloomberg, CNN, NBC, and the Financial Times.
Normalize rejection - because rejection is a daily part of my and every entrepreneur's life. - Christina Qi
The details that don't fit in a pitch deck.
Home base is a small menagerie: roughly 10 chickens, 2 turtles, and a 15-year-old dog.
She named a billion-dollar fund after two college landmarks - the MIT Dome and Harvard Yard.
The seed capital was about $1,000 - savings, not a fund, not a family office.
She sat in on lectures with a Nobel laureate - then went back to teach students herself.
She wrote a memoir about the FBI, the fund, and finance's biggest personalities.
Her rule of thumb: how a company treats its lowest-paying clients tells you what it's really made of.
In her own words.
Where to find her.
Sources: christinaqi.com, MIT Sloan, Databento Blog, Business of Business, Pioneer Institute, Differential Ventures. Facts drawn from public interviews and profiles.