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I ran a fun experiment trying to beat the danish C25 index with just Gemini 2.5 in simulation.
I fed Gemini 2.5 with stock data, danish news articles, Wikipedia & Google trends top lists and much more like Eurostat data to see if I could get Gemini to beat the danish C25 stock index. (Novo Nordisk, Carlsberg, Mærsk etc.)
It could only see the current days data and backwards and was prompted to not take in forward data from its training data. It was prompted to follow these strategies among others::
- Take a longer term perspective - Be conservative with position sizes - Only trade when seeing a clear opportunity
It did pretty well, but ended up doing a couple bad moves selling at bad times - it almost feels like it panicked.
Data is from (01-01-2025 to 11-12-2025).
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Any ideas on improving it? I think next step is using more a Chain of Thought process and multiple personas to evaluate each investment.
