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Jev run through quant trading backtests avoids overtrading

Using old quant infrastructure, the author gave Jev two years of OHLCV plus proprietary data and long/flat/short actions, finding it makes patient decisions, avoids overtrading, and is consistent, cheap and fast.

Leo Linsky
@leo_linskyArchived 2026.09.19Originally posted 2026.09.19
Jev run through quant trading backtests avoids overtrading
Leo Linsky @leo_linskyOriginally posted 2026.09.19
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We aren't running Jev through our formal benchmarks because many of our evaluations involve open-ended design. But I was curious about its capabilities, so I ran it through some tests with my old quant trading infrastructure. I gave Jev some proprietary data alongside OHLCV over the last 2 years and a few actions it could choose from (long/flat/short). It's likely that some recent price data leaked into Jev's pre-training corpus (even though @typesafeai says their data is mostly synthetic), but I still thought it did a decent enough job to be worth running a more controlled experiment. It makes reasonable, patient decisions and avoids overtrading (which other LLMs we've tested struggle with). It's consistent, cheap, and fast. I definitely see the practical use cases for this model. Next step: obfuscating the symbol names, prices, and dates, and running it again.

x.com/leo_linsky/status/2101072181455114582Archived 2026.09.19 10:18