数据来源
本站每项数据均可追溯至以下来源之一，或基于这些来源的有据可查的衍生计算。原始授权数据与我们的衍生指标分开存储并单独标注。
| 数据来源 | 所提供的内容 | 数据时效性 |
|---|---|---|
| Cboe (delayed quotes) | Full options chains per underlying: bid/ask, last, volume, open interest, implied volatility and greeks per contract, plus the delayed underlying price used for chain-derived metrics | Delayed ~15+ min; core symbols refreshed hourly in market hours, full universe every 3 hours, definitive snapshot after each close |
| Financial Modeling Prep | Equity/ETF quotes, daily closing-price history (index history via ^GSPC, ^NDX, ^RUT, ^VIX), company profiles, earnings dates & EPS/revenue estimates and actuals, per-symbol news aggregation | Delayed, typically 15–20+ min; quotes hourly, history and earnings daily |
| Options Band 衍生指标 | Expected moves, IV30, realized volatility, skew, put/call ratios, concentration measures, probability estimates, the append-only snapshot database — computed from the sources above, versioned (current: em-1.0) | Computed at each refresh; snapshots daily after the close · 方法论 |
| 主流新闻资讯 | CNBC, MarketWatch, Yahoo Finance and per-symbol outlet aggregation — always credited and linked out; press-release wires and rating mills blocklisted | 每小时 |
数据提供商的运行状态与最近成功时间均受到内部监控；数据模块若出现过期情况，将在相应页面标注提示，而非静默替换。数据内容随时可能不完整或被来源方修订，请在采取任何行动前核对原始数据来源。