Hat are the topgainers today

Screening Filters

1. list_exchange: ['XNYS', 'XNAS', 'XASE']

   • Purpose: Limit results to major U.S. stock exchanges.
   • Rationale:
     • XNYS = NYSE, XNAS = NASDAQ, XASE = NYSE American (AMEX) — together they represent the core of the U.S. stock market where most actively traded and institutionally followed stocks are listed.
     • This directly aligns with “US stock market today,” and excludes OTC/pink-sheet names that can be illiquid or highly speculative.

2. price_change_pct: {'min': '5'}

   • Purpose: Surface stocks with sizable gains for the day.
   • Rationale:
     • A minimum daily move of +5% is a meaningful gain for most listed stocks and is a common threshold to define “gainers” or “movers.”
     • This filter targets names that stand out from normal daily volatility and focuses the list on stocks that are actually “top gainers” rather than just up slightly.

3. volume: {'min': '1000000'}

   • Purpose: Ensure the gainers are actively traded and liquid.
   • Rationale:
     • At least 1,000,000 shares traded in the session indicates strong participation and real interest from the market.
     • It helps avoid illiquid names where a large percentage move could be caused by just a few small trades and may not be actionable for most investors.

4. market_cap: {'min': '300000000'}

   • Purpose: Filter out very small, highly speculative micro-cap stocks.
   • Rationale:
     • A $300M+ market cap focuses on more established companies, reducing exposure to tiny, more easily manipulated names whose “big gains” can be purely noise.
     • This makes the “top gainers” list more relevant to most traders and investors who care about investability and stability.

5. price: {'min': '2'}

   • Purpose: Exclude ultra-low-priced/penny stocks.
   • Rationale:
     • Stocks under $2 are typically considered penny or distressed names, where a 30–50% swing can occur on minimal volume or single news items.
     • Setting a floor at $2 keeps the focus on more standard listed equities and avoids skew from extremely low-priced tickers whose percentage changes can be misleading.

Why Results Match Your Request

• The exchange filter ensures you’re seeing gainers from the core U.S. stock market (NYSE, NASDAQ, AMEX), exactly the universe you asked about.
• The price_change_pct ≥ 5% directly targets strong positive movers, which is what “top gainers” implies.
• The volume ≥ 1M and market_cap ≥ $300M constraints make sure these big moves are:
  • happening in liquid, widely traded stocks, and
  • occurring in reasonably sized companies, not obscure micro-caps.
• The price ≥ $2 filter removes extreme penny stocks, so the list highlights actionable, more investable gainers rather than thinly traded outliers.

Combined, these filters aim to show you the most significant and tradable U.S. stock gainers today, aligning with how professional traders typically define and screen for “top gainers.”