Which bio stocks is declining

Screening Filters

1. Market Cap ≥ 1,000,000,000 (≥ $1B)

   • Purpose: Focus on larger, more established biotech companies.
   • Rationale: The user asked “which biotechnology stocks” in general, not speculative micro‑caps. A $1B+ market cap filter narrows results to companies that:
     • Are more likely to have analyst coverage and public information.
     • Tend to be more stable and less prone to extreme, random price swings.
     • Are more relevant for most investors than very small, illiquid biotech names.

2. Volume ≥ 500,000 shares (daily)

   • Purpose: Ensure the stocks are actively traded and realistically investable.
   • Rationale: A minimum volume filter:
     • Removes thinly traded biotech stocks where prices can be distorted by a few small trades.
     • Increases the likelihood that “declines” reflect genuine market sentiment, not illiquidity.
     • Makes it easier to enter/exit positions without excessive bid–ask spreads.

3. Sector = Healthcare

   • Purpose: Restrict the universe to the broader healthcare space.
   • Rationale: Biotechnology companies are typically classified under Healthcare. Starting with this sector ensures we’re in the right macro bucket before narrowing further to a specific industry.

4. Industry = Biotechnology & Medical Research

   • Purpose: Precisely target biotechnology stocks within Healthcare.
   • Rationale: This directly implements the user’s request for “biotechnology stocks”:
     • Excludes unrelated healthcare sub-industries (e.g., hospitals, insurers, equipment makers).
     • Focuses on companies doing biotech R&D, drug development, and related medical research.

5. Price Change % ≤ -2% (on the day or selected period)

   • Purpose: Capture stocks that are currently declining in price.
   • Rationale: To answer “currently declining,” we need a negative price move:
     • A maximum price change of -2% means the stock is down at least 2% over the chosen period.
     • This sets a meaningful threshold so the decline isn’t just market noise (like -0.1%).

6. Moving Average Relationship = PriceBelowMA20

   • Purpose: Identify stocks in a short-term downtrend, not just a single-day dip.
   • Rationale: “Currently declining” can mean more than one bad day; it can imply a weaker short‑term trend:
     • The 20-day moving average (MA20) is a common short-term trend indicator.
     • Price below MA20 suggests the stock has been under pressure for several weeks, reinforcing that it’s in a declining phase rather than a momentary blip.

Why Results Match

• The sector and industry filters ensure we are only looking at genuine biotechnology & medical research companies, directly matching the “biotechnology stocks” part of the question.
• The price change ≤ -2% and price below 20-day moving average filters jointly define stocks that are currently declining, both in the immediate term (negative price move) and trend-wise (trading below a key short-term average).
• The market cap and volume filters make the results more reliable and investable, removing extremely small or illiquid biotech names whose movements might not meaningfully reflect a true “decline” in a way most investors can act on.