Terms of Service

1. The service

NineQuantAI (ninequantai.com) provides:

• A strategy backtest tool that computes the simulated performance of a given strategy and parameter set over a chosen period of historical market data, reporting return, drawdown, win rate and other statistics together with trade-by-trade detail.
• A market data API offering daily bars, quotes and batch queries for US equities and US-listed ETFs in a uniform response format.
• Research content — strategy research articles and beginner tutorials.

Every feature of the platform is provided solely for personal quantitative research and educational purposes. The platform is not a broker-dealer, investment adviser or licensed financial institution of any kind, and conducts no activity that requires a financial licence.

2. Not investment advice

Nothing provided by the platform — including backtest results, market data, indicator calculations, strategy descriptions, research articles and interpretations generated by AI assistants — constitutes securities investment advisory services, nor investment, financial, legal or tax advice.

• It is not an offer, solicitation or recommendation regarding any security, fund, derivative or other financial product;
• It does not assess the financial situation, investment objectives or risk tolerance of any particular user;
• It makes no prediction or guarantee about the future price, movement or performance of any instrument.

Historical backtest results do not represent future returns. A backtest simulates a rule set on historical data and cannot predict the future; its fill assumptions differ from live trading; and repeatedly tuning parameters on the same history produces overfitting that makes results look materially better than the strategy will perform going forward.

All trading decisions, and all resulting profits and losses, are entirely your own responsibility. Investing in securities carries the risk of losing your principal. Before making any investment decision, judge independently based on your own circumstances and, where appropriate, consult a suitably licensed professional. The platform connects to no broker and has no capability to place orders, trade or transfer funds.

3. Accounts and API use

• Confidentiality — registration requires a valid email address. Your API key is your credential; keep it safe. Calls and consequences arising from a key you have exposed are your responsibility. Reset the key in the dashboard immediately if it leaks.
• Rate limits — call frequency and quotas for each plan are as shown on the pricing page and in the dashboard. You may not circumvent or evade rate limits or quotas by using multiple accounts, rotating proxy IPs, forging request headers or registering accounts in bulk.
• No unlawful use — you may not use the platform for any unlawful purpose, including market manipulation, insider trading or money laundering; attack, penetrate or gain unauthorised access to the platform; or systematically scrape, mirror or resell the platform's market data.

We reserve the right to suspend or terminate accounts engaged in any of the above without refunding fees already paid.

4. Data accuracy

The platform makes no guarantee as to the timeliness, completeness or accuracy of market data or backtest results.

• Market data comes from third-party sources and may be delayed, missing, erroneous or revised after the fact.
• By default the platform distributes end-of-day data at T+1 or older; API responses label the data's timeliness and venue convention, and the available historical range is whatever the data_range field of the response reports.
• The service may be interrupted by maintenance, upgrades, failures of third-party dependencies or force majeure. We do not guarantee uninterrupted or error-free operation.

Verify independently before relying on any data from the platform to make a decision.

5. Intellectual property

Copyright and related rights in the platform's interface design, source code, documentation, research articles, trademarks and logos belong to us and are protected by law. Rights in market data belong to the original data providers and exchanges; you receive only a non-transferable licence to use it within the scope these terms permit.

Without written permission you may not copy, modify or reverse-engineer the platform's software, or use the research articles commercially. Reposting requires attribution and a link to the original, without altering the content or removing the disclaimer.

6. Limitation of liability

The platform is provided "as is" and "as available", without warranties of any kind, express or implied, including but not limited to merchantability, fitness for a particular purpose, accuracy and non-infringement.

To the fullest extent permitted by applicable law, we are not liable for any direct, indirect, incidental, special or consequential loss, including but not limited to investment losses, lost profits, loss of data or business interruption, whether or not foreseeable. Our total liability to you shall in no event exceed the fees you actually paid us in the 12 months preceding the event giving rise to the claim; if you use the free service, that cap is zero.

These terms are governed by the laws of the People's Republic of China; any dispute arising from them should first be resolved through good-faith negotiation.

7. Changes and termination

• We may add, modify, suspend or discontinue any feature of the platform at any time. Where a change materially affects the rights of paying users, we will give advance notice by email or on the site.
• You may stop using the platform at any time and close your account from the dashboard. Fees already paid are non-refundable unless applicable law mandates otherwise.
• If you breach these terms, we may suspend or terminate your account without prior notice.
• The intellectual property and limitation of liability clauses survive termination.

8. Changes to these terms

We may revise these terms from time to time. Revised terms take effect when published on this page, and the "last updated" date at the top is changed accordingly. For material changes we will give advance notice by email or prominently on the site. Continuing to use the platform after a revision takes effect constitutes acceptance of the revised terms.

9. Contact us

For any question about these terms, email support@ninequantai.com; for business enquiries, business@ninequantai.com. We normally reply within 1–3 business days.