Leading percentage gainer

Screening Filters

1. price_change_pct: { "min": "0" }

   • Purpose: Include only stocks that are up on the day (i.e., positive percentage price change).
   • Rationale:
     • You asked for the leading percentage gainer in the US market, which by definition must have a positive price change.
     • Setting a minimum of 0% filters out all decliners and flat movers, leaving only gainers.
     • Once you have this subset, you can rank them by price_change_pct in descending order to find the top gainer.

2. list_exchange: ["XNYS", "XNAS", "XASE"]

   • Purpose: Limit the universe to stocks listed on the main US exchanges:
     • XNYS = New York Stock Exchange (NYSE)
     • XNAS = NASDAQ
     • XASE = NYSE American (formerly AMEX)
   • Rationale:
     • You specified the US stock market, which is most commonly represented by these primary exchanges.
     • This avoids including over-the-counter (OTC) or foreign exchanges, which would not match your “US stock market” focus.
     • These exchanges cover the vast majority of actively traded, regulated US equities, where “leading percentage gainer” is usually measured.

Why Results Match:

• The US focus in your request is addressed by restricting to US-listed stocks on NYSE, NASDAQ, and NYSE American via list_exchange.
• The “leading percentage gainer” concept is addressed by:
  • Filtering to only positive movers with price_change_pct ≥ 0.
  • From that set, the stock with the highest price_change_pct on the day would be the leading gainer.

The filters don’t by themselves pick the single top stock; instead, they define the correct universe (US-listed gainers). Ranking that universe by price_change_pct will then identify the exact leading percentage gainer you’re asking about.