Compare stock heat maps and stock screeners for discovery, filters narrow the universe; percentile heat maps rank relative strength within peer groups.
Screeners answer who qualifies. Heat maps answer who stands out among peers.
Buydy Research
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Focused on practical screening workflows for investors who want repeatable market context.
Investors often ask whether they need a stock screener or a stock heat map. In Buydy today the honest split is different: there is no dedicated stock screener route. Large-cap equities are compared on the stock heat map (percentile grid plus sidebar filters). ETF screening is a separate live surface for US-listed funds.
The ETF screener applies filters to a fund universe: expense ratio, AUM, yield bands, and other available fields. The output is a sortable table of ETFs that match your rules.
ETF screening excels when you know mandate constraints upfront and need to shrink a large fund list quickly.
A heat map compares many equities at once using relative context. Color and rank reflect percentile standing within sector or industry peers, not just raw magnitude. ETF tickers are excluded from this view.
Buydy's stock heat map helps you spot outliers across a watchlist or after you pull underlying holdings from an ETF shortlist.
Heat maps excel when you need to prioritize among equities that already match your research scope.
Traditional stock screeners apply rules to an equity universe and return a list. Buydy does not mirror that as a separate product today. The closest equity workflow is: heat map filters (sector, industry, price range, completeness) plus ranking on percentile columns.
A practical sequence for equity research:
For ETF research, run the ETF screener first, compare finalists with how to compare ETFs, then open the stock heat map on top holdings when you need equity percentile context.
This avoids two common traps: screening without context (long lists, no priority) and heat-mapping without constraints (pretty color, no mandate fit).
Use ETF screening only when your question is fund selection (fees, AUM, yield, exposure).
Use heat maps only when you already hold a curated equity set and need weekly re-ranking, for example, tracking percentile shifts across the same twenty large-cap names.
Research summaries, not investment advice.