I'd go the other way, please don't add commentary and a good way to monetize this kind of site would be to charge for access to a separate related forum/discourse instance. Optionally you could show comments if someone wants to see them on the page (or include a link to the dedicated forum thread for every post).
Having commentary on a site like this is a great way to turn into WSB/StockTwits and/or have people attempting to pump and dump.
Fair point -- if the goal is monetization/stickiness-for-advertising instead of quality (no moral judgement on my part) then maybe it does make sense to encourage the "engagement" of users in that way.
I wonder if it's harder to stand-out as an WSB/StockTwits alternative or as a product for investors looking for a "better" news source.
HN biggest achievement is its civil, informative, curated, comment section.
Without comments, you have "stock news from 40+ sources", just not "Hacker News-ish".
Having commentary on a site like this is a great way to turn into WSB/StockTwits and/or have people attempting to pump and dump.