America Stocks

Screening Filters

1. market_cap ≥ 30,000,000,000 (≥ 30B USD)

   • Purpose: Focus on larger, more established U.S. companies.
   • Rationale: When someone simply says “美国股票” (U.S. stocks) without specifying small caps, growth, or speculative names, it’s natural to start with big, well-known companies. A ≥30B market cap targets major corporations that tend to have:
     • More stable business models
     • Better liquidity (easier to trade)
     • More analyst coverage and information transparency

2. market_cap_category: ['mega', 'large']

   • Purpose: Explicitly restrict results to large-cap and mega-cap stocks.
   • Rationale: This reinforces the previous filter, ensuring the screen stays in the universe of major U.S. companies (the kind most international investors mean when they say “美国股票”), avoiding small, illiquid, or highly speculative names.

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

   • Purpose: Limit results to U.S. exchanges: NYSE, NASDAQ, and AMEX.
   • Rationale: Your query is specifically about “美国股票”, so these are the primary U.S. stock exchanges:
     • XNYS – New York Stock Exchange
     • XNAS – NASDAQ
     • XASE – NYSE American (AMEX)
       This ensures you’re truly seeing U.S.-listed stocks, not foreign listings or OTC markets.

4. is_index_component: ['GSPC'] (S&P 500 constituents)

   • Purpose: Restrict the universe to companies that are part of the S&P 500 index.
   • Rationale: The S&P 500 is the primary benchmark for major U.S. stocks. Using this filter:
     • Focuses on leading U.S. companies across sectors
     • Implicitly ensures minimum size, liquidity, and financial reporting standards
       This aligns well with a broad, mainstream idea of “代表性的美国股票”.

5. net_margin ≥ 10%

   • Purpose: Select companies with solid profitability.
   • Rationale: A net profit margin of at least 10% means the company keeps a meaningful portion of its revenue as profit:
     • Screens out low-margin, struggling, or structurally weak businesses
     • Prioritizes financially healthier and often more resilient companies

6. return_on_equity (ROE) ≥ 15%

   • Purpose: Emphasize efficient use of shareholder capital.
   • Rationale: ROE ≥ 15% is a common threshold for “high quality” companies:
     • Indicates management is generating strong returns on the equity invested
     • Often associated with competitive advantages, strong brands, or efficient operations

7. pe_ttm between 8 and 25

   • Purpose: Filter out extremely cheap (possibly distressed) and extremely expensive (possibly overhyped) stocks.
   • Rationale:
     • PE < 8 can signal market concerns about the company’s future (cyclical risk, structural issues)
     • PE > 25 may indicate very high growth expectations or overvaluation
       By keeping PE within 8–25, the screen aims for:
     • Reasonable valuation relative to earnings
     • Avoiding extremes on both value traps and overly speculative growth names

Why Results Match “美国股票”:

• The exchange and index component filters ensure you get mainstream, U.S.-listed blue-chip names, which typically represent what people mean by U.S. stocks.
• The market cap and category filters focus on large, liquid, globally recognized U.S. companies, suitable as core holdings or for studying the U.S. market.
• The profitability (net margin, ROE) and valuation (PE range) filters upgrade the search from just “any U.S. stocks” to financially solid, reasonably valued U.S. stocks, which are usually more appropriate for most investors starting from a broad request like “美国股票”.