Free Options Data
Download Guide免费期权数据
下载与验证指南
Download options chains in CSV, JSON, or API form—and keep the timestamps, fields, and license details needed for trustworthy research.
以 CSV、JSON 文件或通过 API 下载期权链，
并保留开展可靠研究所需的时间戳、字段与许可条款。
Free options data download: the short answer免费期权数据下载：要点速览
Use a broker export or a market-data API for current chains; use exchange and research datasets when you need documented reference files.
Define ticker, expiration range, strikes, quote interval, and whether you need chains, trades, quotes, Greeks, or open interest.
Free access often means delayed snapshots, short history, rate caps, personal-use terms, or missing Greeks.
Keep the untouched download with its retrieval time, source, timezone, adjustment rules, and license note before cleaning it.
获取当前期权链时，可优先使用券商的导出功能或市场数据 API；如需附有完整说明的参考文件，可选择交易所或研究机构发布的数据集。
明确标的代码、到期日范围、行权价和报价时间间隔，并确定需要期权链、成交记录、报价、希腊值还是未平仓量。
免费访问通常只提供延迟快照和较短时段的历史数据，还可能限制请求频率和使用范围，或不提供希腊值。
清洗数据前，请保留未经改动的原始下载文件，并记录获取时间、数据来源、时区、调整规则和许可说明。
Where to download free options data哪里可以下载免费的期权数据？
No single free source covers every contract, date, quote, trade, and Greek. A public dashboard, downloadable sample, API free tier, and broker export are different products: compare the actual file or endpoint, not the supplier logo.
没有任何一个免费数据源能够完整覆盖每份合约、所有日期、报价、成交数据和希腊值。公开网页、可下载样本、API 免费套餐与券商导出是不同产品；比较时应看具体文件或接口，而不是只看供应商品牌。
| Source type来源类型 | Typical download常见下载内容 | Best use适用场景 | Watch for注意事项 |
|---|---|---|---|
| Broker export券商导出 | Current chain or watchlist CSV.当前期权链或自选列表 CSV。 | Manual research and small snapshots.手动研究与小规模数据快照。 | Login, entitlements, redistribution terms.账户登录要求、行情权限与再分发条款。 |
| Free market-data API免费市场数据 API | JSON chains, quotes, contract metadata.JSON 格式的期权链、报价与合约元数据。 | Repeatable scripts and scheduled pulls.可重复运行的脚本与定时拉取任务。 | Rate caps, pagination, delayed quotes.请求频率上限、分页机制与延迟报价。 |
| Exchange or regulator交易所或监管机构 | Reference files, calendars, statistics.参考文件、交易日历与统计数据。 | Contract validation and official context.核验合约信息并了解官方背景。 | May not include full quote history.可能不提供完整的历史报价数据。 |
| Research dataset研究数据集 | Samples or curated historical files.样本或经整理的历史数据文件。 | Teaching, prototypes, reproducible examples.教学、原型开发与可复现实例。 | Coverage gaps and noncommercial licenses.可能存在数据覆盖缺口，且许可仅限非商业用途。 |
Fields every options download should preserve期权下载文件必须保留的字段
Store the underlying symbol, provider contract ID, OCC-style symbol when available, expiration date, strike, option type, multiplier, and exercise style.
Keep the quote timestamp and timezone, bid, ask, last price, bid/ask sizes, volume, open interest, and the underlying price observed at the same moment.
Preserve implied volatility and Greeks only with their model assumptions, calculation time, and source. Never mix provider-computed values as if they were identical.
Add retrieval time, endpoint or export name, request parameters, page cursor, provider version, license note, and a checksum for the raw file.
保存标的代码、数据提供商的合约 ID；若数据中包含 OCC 格式的合约代码，也应一并保留。此外，还需保留到期日、行权价、期权类型（看涨或看跌）、合约乘数和行权方式。
保留报价时间戳及其时区、买价、卖价、最新成交价、买方和卖方报价量、成交量、未平仓量，以及同一时点观测到的标的资产价格。
保存隐含波动率和希腊值时，必须同时记录所采用的模型设定、计算时间和指标来源。不同数据提供商计算的数值不可直接视为口径一致。
同时记录文件获取时间、API 端点或导出任务名称、请求参数、分页游标、数据提供商的版本号、许可说明，以及原始文件的校验和。
A reproducible options-data download workflow一套可复现的期权数据下载流程
1. Write the dataset contract1. 先写清数据集约定
Define underlyings, expiration window, strike range, calls and puts, observation clock, required fields, file format, compression, partitioning, and acceptable delay. State whether the result is a current snapshot, end-of-day history, or point-in-time intraday data.
明确标的范围、到期日窗口、行权价区间、认购认沽覆盖、观测时钟、必备字段、文件格式、压缩方式、分区规则和可接受延迟，并说明结果属于当前快照、日终历史还是严格时点日内数据。
2. Download into an immutable landing area2. 将原始文件保存到不可变存储区
Write every original file or API page once. Name it with supplier, dataset, market date, retrieval time, and page or partition. Store a checksum, byte size, response headers, parameters, and license note in a sidecar manifest before parsing.
每份原始文件或 API 分页只写入一次，文件名包含供应商、数据集、市场日期、抓取时间和分页或分区信息。解析前先在配套清单中保存校验和、字节大小、响应头、请求参数和许可说明。
3. Validate completeness before normalization3. 标准化前先验证完整性
- Confirm expected files, pages, expirations, and contract counts arrived.
- Reject truncated archives, checksum mismatches, duplicate pages, and malformed rows.
- Distinguish empty data from authentication failure, no entitlement, holiday, and not-yet-published.
- Compare a sample of contract symbols, strikes, and timestamps with the supplier interface.
- 确认预期文件、分页、到期日与合约数量均已到达。
- 拒绝截断压缩包、校验和不一致、重复分页和格式错误记录。
- 区分数据为空、认证失败、无权限、休市和尚未发布。
- 抽样将合约代码、行权价和时间戳与供应商界面对照。
4. Publish raw, clean, and derived layers separately4. 分开发布原始层、清洗层与衍生层
Normalize types and field names into a clean layer while preserving source values. Calculate midpoint, spread, moneyness, IV, or Greeks only in a derived layer with versioned logic. A correction should add a traceable version rather than silently rewriting the original evidence.
在清洗层统一数据类型和字段名，同时保留来源值；中间价、价差、虚实值程度、隐含波动率或希腊值只在衍生层按版本化逻辑计算。发生更正时，应新增可追溯版本，而不是悄悄覆盖原始证据。
5. Reconcile every scheduled run5. 逐次核对定时下载结果
Track expected versus received partitions, row counts, unique contract keys, null rates, timestamp ages, and correction counts. Alert on missing expirations, unexplained schema changes, multiplier shifts, or a download that succeeds technically but returns an incomplete universe.
持续跟踪预期与实际分区、行数、唯一合约键、空值率、时间戳年龄和更正数量，并对到期日缺失、无法解释的结构变化、乘数变化，以及技术请求成功但市场覆盖不完整的下载发出告警。
Use QVeris to find options data capabilities使用 QVeris 查找期权数据服务
The exact QVeris Options Chain Tool is the closest verified capability for building a repeatable current-chain download. Its record includes calls and puts by expiration and strike with last price, bid, ask, volume, and open interest. Inspect one response in the Playground before deciding the export schema; history, pagination, timestamps, and entitlement still require testing.
已核实的最接近能力是 QVeris Options Chain 工具，适合构建可重复的当前期权链下载。其记录包含按到期日和行权价组织的认购、认沽合约，以及最新成交价、买价、卖价、成交量和未平仓量。确定导出结构前，应先在 Playground 检查实际响应；历史深度、分页、时间戳和授权仍需实测。
- Test one known symbol and expiration, then save the raw response unchanged.
- Record the tool ID, parameters, retrieval time, response checksum, and validation result.
- Use the Free Options Data API Guide when the workflow needs scheduled API access rather than manual downloads.
- 测试一个已知标的和到期日，并原样保存响应。
- 记录工具 ID、请求参数、抓取时间、响应校验和和校验结果。
- 当工作流需要定时 API 接入而不是手动下载时，可参阅免费期权数据 API 指南。
FAQ常见问题
Start with broker exports, free options APIs, exchange reference files, and research datasets. Compare history, delay, fields, rate limits, and license before choosing.
Samples and limited history exist, but complete historical chains, quotes, trades, Greeks, and implied volatility are rarely free.
Not necessarily. Many free feeds are delayed, snapshot-based, available only during a broker session, or restricted by exchange entitlements.
CSV is convenient for spreadsheets and batch research. JSON is better for repeated API calls, nested contract metadata, and pagination.
可以先查看券商提供的数据导出功能、免费期权 API、交易所参考文件和研究数据集，再比较历史数据覆盖范围、报价延迟、可用字段、请求频率限制与许可条款。
可以找到样本和覆盖范围有限的历史数据，但完整的历史期权链、报价、成交数据、希腊值与隐含波动率数据很少免费提供。
不一定。许多免费数据源提供的是延迟数据或定时快照；有些仅在券商账户会话有效期间可用，还有些会受到交易所行情数据权限的限制。
CSV 更便于使用电子表格处理数据和开展批量研究；JSON 更适合反复调用 API，以及处理嵌套的合约元数据和分页结果。
References and next steps参考资料与下一步
Cboe options statistics
Historical Option Data samples
Alpha Vantage options documentation