@davidhfdata

Synthetic financial data and event forecasting YC S26

 San Francisco
davidhf.com
Joined June 2026
  • Tweets16
  • Following9
  • Followers35
4Media
Frontier LLMs are impressive at many things. Trading is not one of them. We had Fable, GPT-5.5, Gemini 3.5 Pro, and Grok 4.5 each run a portfolio for ~1.6 years on a synthetic stock market they've never seen. All of them lost money. Think you can beat the benchmark? Try it 👇
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david-hedgefund.github.io/sy…
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David Data retweeted
Alex Sima
@sima_alexxJul 16
Taking the leap is hard, but there's joy in the unknown. @AdiKulkarni6 and I spent senior year pivoting through 4 ideas (including an AI hedge fund). Now we're building @davidhfdata — synthetic market data for superhuman AI trading. Excited to join @ycombinator S26!
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Adi Kulkarni
@AdiKulkarni6Jul 16
Superhuman AI traders won't be trained on the past. They'll be trained on every possible future. That's what @sima_alexx and I are building at @davidhfdata. Excited to join @ycombinator S26
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try it at davidhf.com

David Data | Synthetic Financial Data API

Synthetic market worlds for backtesting and AI agents. REST API, no licensing limits.

davidhf.com
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David Data retweeted
Adi Kulkarni
@AdiKulkarni6Jul 11
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We spent $98,151.86 on stock markets that don't exist. Because your trading agent already memorized the ones that do. 2008, 2020, every real crash…it's all in the training data. David Data gives you synthetic markets your model has never seen.
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Try it at data.davidhf.com Docs: docs.davidhf.com

David Data | Synthetic Financial Data API

Synthetic market worlds for backtesting and AI agents. REST API, no licensing limits.

data.davidhf.com
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Backtest on markets that never happened, agree or disagree?
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Real history is one roll of the dice. We let you roll it a million times.
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we want to help-max you if you're AI trading maxxing and don't have enough data maxxing or want to evaluate-max on future historically maxxed scenario maxing. We provide synthetic-maxxed financial-maxing data-maxxing API to the max (rate limit max) and we have AI cofounder Max.
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