| Yield Curve (10-Year Minus 2-Year) | Inversion historically precedes recessions and bear markets. | FRED:T10Y2Y | Leading |
| Cyclically Adjusted P/E (CAPE) | Long-term valuation metric; high readings warn of stretched valuations. | Custom data | Leading |
| Advance-Decline Line (ADL) | Weakening breadth while indices rise can foreshadow market tops. | Custom / scripts | Leading |
| Hindenburg Omen | Internal market instability before major drops. | Custom / scripts | Leading |
| Consumer Sentiment (UMich) | Declining optimism can precede reduced spending and market weakness. | FRED:UMCSENT | Leading |
| Co-Movement / Correlation Spike | More stocks moving together = rising systemic stress. | Custom scripts | Leading (short-term) |
| Margin Debt Levels | Excess leverage increases crash risk when selling starts. | External | Leading |
| Leading Economic Index (LEI) | Composite of forward-looking economic indicators. | External | Leading |
| JOLTS Job Openings | Sudden drop signals hiring slowdown; may precede spending weakness. | FRED:JTSJOL | Leading |
| ISM Manufacturing PMI | <50 indicates contraction, often ahead of earnings declines. | ECONOMICS:USPMI | Leading |
| Initial Jobless Claims | Weekly rise is often an early sign of economic stress. | FRED:ICSA | Leading |
| Nonfarm Payrolls | Monthly jobs growth; weak prints can shake markets. | ECONOMICS:USNFP | Coincident |
| Unemployment Rate | Labor market health; spikes confirm downturn already underway. | FRED:UNRATE | Lagging |
| Corporate Credit Spreads | Widening spreads = higher default risk and stress. | Proxy ETFs (LQD/IEF) | Leading |
| Volatility Index (VIX) | Measures expected S&P 500 volatility; spikes with fear. | VIX | Coincident / Lagging |
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