Privacy Policy
How MTB Quant Library handles information. Last updated: 26 October 2026.
MTB Quant Library ("the site," "we," "us") is a free educational product of NinetySevenGroup Co., Ltd. This Privacy Policy explains what information is involved when you use the site.
Who operates this site
The site is operated by NinetySevenGroup Co., Ltd. Related brands such as M.T Blue are operated under the same group. External sites linked from our footer (for example ninetysevengroup.net or mtblue-nsg.com) have their own privacy practices.
No accounts
You do not need an account, login, email address, or payment details to read the library. We do not ask you to create a user profile on this site.
Information stored on your device
To keep reading preferences and study progress between visits, the site may store small amounts of data in your browser's local storage on your device, for example:
- appearance / theme choice
- chapter and section bookmarks
- which chapters you have marked complete
This data stays in your browser. It is used only to restore those preferences and progress on the same device. Clearing site data in your browser removes it. We do not use that local storage as a cross-site advertising identifier.
Cookies and similar technologies
The library application itself is built to rely on local device storage for preferences and progress, not on advertising or analytics cookies that we set for tracking you across other websites.
Like most websites, the hosting or delivery infrastructure (for example a hosting provider or content network) may process technical request data such as IP address, browser type, and timestamps in server logs in order to operate, secure, and diagnose the service. That processing is controlled by those providers under their own terms where applicable.
If we later add non-essential cookies or third-party analytics, we will update this policy and, where required, seek appropriate consent.
What we do not sell
We do not sell your personal information. We do not use the library to run a marketplace in student data.
Children
The site is written for learners of quantitative mathematics, including adults and students in higher education. It is not directed at young children. We do not knowingly collect personal information from children to create accounts, because the site does not offer accounts.
Links to other sites
Links to NinetySevenGroup, M.T Blue, or other external sites are for convenience. Their privacy policies apply when you leave MTB Quant Library.
Changes
We may update this Privacy Policy from time to time. The "Last updated" date at the top will change when we do. Continued use of the site after an update means you accept the revised policy.
Contact
Questions about this Privacy Policy can be directed to NinetySevenGroup Co., Ltd. through the contact channels published on ninetysevengroup.net.