Index inclusion and deletion. Inclusion brings a permanent passive bid; the run-up happens between announcement and effective date.
What to watch: S&P 500 additions; Nasdaq-100 changes. It arrives quarterly, and the effect typically lasts weeks.
It sits in tier 4 — Stock and sector specific: Moves one company or one group, not the market. Any factor here becomes tier one if it gets large enough — a bank failure and a pandemic both started as somebody's sector news.
Its neighbourhood
Everything this entry connects to directly. Click any point to follow it.
Also in Corporate actions and stock-specific events
- Individual earnings reports and guidance
- Pre-announcements and profit warnings
- Mergers and acquisitions
- IPOs, lockup expirations, and secondaries
- Share issuance and dilution
- Insider buying and selling
- Activist investors and 13D filings
- 13F holdings disclosures
- Analyst upgrades, downgrades, and price targets
- Short-seller reports and accounting questions
- Management and board changes
- Product launches, trial results, and approvals
- Litigation, settlements, and product liability
- Corporate credit rating changes
- Dividend cuts, initiations, and special dividends
- Stock splits
- IPO window and public-market shrinkage
- FDA approvals and PDUFA dates
- Private equity exit backlog and marks