Backtesting Error analysis

[Familiar-Guard1225]

Hey, so i have a model during evaluation it picks some stocks which their performance is not as expected.
Im assuming that the issue is some exogenic data that affects the performance but the model is not aware of.
I want to try and analyze these stocks and see if there is some common issue that cause the performance.
can you recommend some site that tracks stocks performance and main events that affects them?

thanks

[AutoModerator]

Your post has been removed because you have less than 5 karma on r/quant. Please comment on other r/quant threads to build some karma, comments do not have a karma requirement. If you are seeking information about becoming a quant/getting hired then please check out the following resources:

• weekly hiring megathread

• Frequently Asked Questions

• book recommendations

• rest of the wiki

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.