Built by an investor,
for investors.
Yoseri started as a personal spreadsheet for treating sports as an alternative asset class. Many positions later, it became the platform that tracks the positions you place yourself — never a broker, just clarity.
Yoseri brings the discipline of investing to a new asset class. Tracking, risk management and analytics — so sports can be managed like a real portfolio, not guessed at.
Jules
Jules built Yoseri after years of managing his own portfolio of value positions in messy spreadsheets. The platform you see today is the tool he wished existed when he started — and the one he uses every day on his own portfolio. Every figure shown on this page is pulled live from the real track record.
“I'm not selling tips. I'm sharing the toolkit I built to measure and manage my own edge.”
“Founder pricing means the founder invests with it, and feels the price.”
Yoseri (寄せり) means
precise placement.
In the Japanese board game go, yose is the endgame — the phase where points are won not by force but by precise, deliberate placement. Every stone counts; nothing is wasted. That's how methodical investing works: the return isn't in one dramatic position, it's in the disciplined accumulation of small, correctly-priced decisions over hundreds of placements. Yoseri is the tool for the endgame.
From bedroom to platform.
First spreadsheet
Jules starts managing his own value positions by hand. Messy, manual, but it worked.
First Python script
The spreadsheet becomes code — pricing markets, computing edge, logging CLV automatically.
Yoseri launched
The personal tool opens to the public as a full portfolio platform.
Yoseri rebrand & native app
A new identity and a native mobile app — the platform comes of age.
Four principles.
Methodical
Every decision is measured. No vibes, no hot takes — just edge, CLV, and discipline.
Transparent
The founder portfolio is public. Gains, losses, and the closing line judge everything.
Founder-priced
The founder invests with it daily and feels the price. Fair by design, not by promise.
Built in public
Roadmap, changelog, and results out in the open. No black boxes.
Invest like the founder does.
Same tools, same prices, same transparency. Free to start.