About OptionCharts Data
OptionCharts is committed to providing accurate and reliable market data from trusted providers. This page explains the sources and methodologies behind our stock and options data.
Data Sources Overview
| Data Type | Source | Details | Delay |
|---|---|---|---|
| Options Data | OPRA | Options Price Reporting Authority (OPRA) provides current and delayed options data, including National Best Bid and Offer (NBBO), last sale price, volume, open interest. | 15-minute delay; Real-time for Ultimate subscribers 1 |
| Stock & ETF Prices | Massive | Fair market value of security. Uses a proprietary algorithm which blends the most recent trades and price movement. | Real-time |
| Index Prices | OptionCharts | Derived price calculated from raw market data using proprietary algorithm. | Real-time |
Additional Information
- Options data comes from the Options Price Reporting Authority (OPRA) feed.
- Options data is from a 15 minutes delayed feed unless subscribed to a real-time options data plan. Learn more about real-time market data.
- OptionCharts is an authorized OPRA data vendor.
Option Pricing Models
For European index options, including SPX, NDX, RUT, and VIX, OptionCharts uses Black-Scholes on each expiration's own forward.
For American equity and ETF options, OptionCharts uses the Bjerksund-Stensland 2002 model.
Each pricing model matches how the option can be exercised and were chosen for accuracy, performance, and industry best practice.