Mistakes in trade record, Quant AI SP500 strategy

A currently Featured strategy (link below) has a remarkable 1-2 day gain back in July 2026 in an otherwise run-of-the-mill strategy record. Good candidate for a spot-check smell test… when I looked closer to see what happened, I found things like this (screenshot) where AMD was purchased for $9.13 and sold a couple days later for $458.74. Wha? AMD was nowhere near $9.13 on 7/28.

And then there’s the AMP (Amphenol) trade, also in the same time period, BTO ~$40, STC ~$150 a day later, during a month (July) when AMP traded exclusively in the mid-70s to 80s! There are more big winners in this short time frame for this strategy that I don’t have time to delve into, but c’mon C2, please? Are there no Sanity Checks in place anywhere to hunt for possible errors like this and flag them for manual checks?

https://collective2.com/details/152974419

2 Likes

Very curious. Thought this was likely a bug but upon checking those trades I almost immediately stumbled upon another one.

Citigroup (C) purchased on 7/28 for 3.26 and sold on 7/31 for 133.55
Citigroup’s 52-week low is 95.83 :thinking: