It was my investment thesis that HN comments reflected the trading activities of a meaningfully large cohort of non-toxic trades-- people with disposable income and opinions that exceeded their actual knowledge. Bored know it all googlers day trading from their desks, and as a result there might be profit to be had trading against it because not only were they frequently just wrong when they were right the market prices exaggerated things.

I consistently made good profits from it, but I had no real basis for setting trade sizes which I was never happy with-- if I could actually see commenters orderflow I could clone their sizes with scaling, but obviously I can't. I didn't resume the activity after the 2020 market turmoil particularly as I had a lot less time available and didn't have a good way to fully automate the practice.