Top gainers for today

Screening Filters

1. price >= 1

   • Purpose: Exclude ultra‑low‑priced “penny” or sub‑penny stocks.
   • Rationale:
     • Many top-percentage gainers under $1 are highly speculative, illiquid, and easily manipulated, which can distort “top gainer” lists.
     • Setting a minimum price of $1 focuses the results on more established, better-traded names, making the list more relevant and practical for most investors.

2. volume >= 500,000

   • Purpose: Ensure that the gainers have meaningful trading activity.
   • Rationale:
     • A stock can show a large percentage gain on just a few thin trades, which doesn’t necessarily reflect broad market interest.
     • Requiring at least 500k shares in daily volume helps surface stocks where the price move is backed by significant liquidity and participation, which is more indicative of genuine “top gainer” status.

3. price_change_pct >= 5

   • Purpose: Capture stocks that are materially up on the day.
   • Rationale:
     • A 5% daily move is a commonly used threshold to define a “strong” gainer in normal market conditions.
     • This filter weeds out minor moves and focuses on names that are truly standing out in terms of performance for the day.

4. list_exchange in [XNYS, XNAS, XASE] (NYSE, NASDAQ, AMEX)

   • Purpose: Restrict results to major U.S. stock exchanges.
   • Rationale:
     • The user asked for gainers “in the US stock market.” NYSE, NASDAQ, and AMEX are the primary U.S. exchanges.
     • Limiting to these avoids OTC/pink sheet listings and foreign exchanges, keeping the results aligned with the mainstream U.S. market.

Why Results Match Your Request

• The exchange filter ensures you only see U.S.-listed stocks.
• The price change threshold (≥ 5%) directly targets stocks that qualify as “top gainers” for today.
• The volume and price filters improve quality and relevance by focusing on liquid, tradeable, and somewhat more established stocks, rather than illiquid microcaps with unreliable moves.