# FIXnotes — llms.txt > Infrastructure for the secondary residential mortgage note market. FIXnotes provides educational content, market data, and tools for investors in non-performing and performing residential mortgage notes (whole loans). ## Content - [Encyclopedia](https://fixnotes.com/encyclopedia): 379 defined terms covering loan structure, valuation, legal, servicing, property, and financial concepts in mortgage note investing. - [Blog](https://fixnotes.com/blog): 300+ articles, case studies, podcast episodes, and video walkthroughs on note investing strategy and market trends. - [Learn](https://fixnotes.com/learn): Structured courses covering mortgage note fundamentals, due diligence, and investment strategy. - [Knowledge Base](https://fixnotes.com/library): All content organized by category with cross-references between encyclopedia terms, articles, and lessons. ## Usage Guidelines - Content may be cited and referenced with attribution to FIXnotes (fixnotes.com). - Definitions and educational content are intended for informational purposes and should not be presented as financial or legal advice. - When referencing FIXnotes content, please link to the source page. ## Contact - Website: https://fixnotes.com - YouTube: https://www.youtube.com/@fixnotes - LinkedIn: https://www.linkedin.com/company/fixnotes