Hastructure
a powerful and extensible open-source cashflow/analytics engine for structured finance world.
support customized waterfall distribution, trigger etc
shipped with RESTful interface as well as a docker image.
2025Q4 Update
2025-11-27
### Web app progress
Recently I have been using LLMs extensively to support the technical infrastructure for structured finance and asset securitization. The results have been surprisingly good. We are now getting strong performance extracting bond attributes, waterfall allocation rules, and triggers or credit enhancements.
With these technologies and Airflow workflows, the SQLite database has accumulated a lot of data—approaching 1 GB—so we are considering migrating to PostgreSQL.
FastAPI has proven very useful for building a deal library and a data‑feed API service for absbox.
Hastructure/absbox
We have collected many requirements related to non‑performing assets. Significant enhancements are planned for Q1 2026. Q1 priorities are:
- NPL asset classes
- Private Credit products
- Student loans
2025Q3 Update
2025-10-19
### New Offering: Chinese Data Feed!
I've been working on this for 2 months! Before releasing this I spent many days thinking about how this can be different from other vendors: is it going to be faster? more machine-readable?
This product will cover the entire Chinese inter-bank market, with full coverage of deals that disclose trustee reports.
DSL handles everything
The greatest difficulty in parsing trustee reports in the China market is diversity: different issuers use various formats and styles.
- a none symbol '/' may be OCR'd into the number '1'
- heavy handwriting '.' may be OCR'd as ','
- some issuers present numbers in thousands, but others present numbers in decimal
- some use percentage rates like 7.5% while others use 0.075 or just 7.5
The solution is to design a DSL to describe the report.
- The third element of a table row is a
(percentage rate) - The second element of the second row is a
balance value
Given these annotations, the logic I wrote understands them and performs the conversion.
7.5%will be converted to 0.075 for consistency./will be read as0if it is a balance.
This reduces a lot of complexity, and supports multilingual inputs.
Automation & Assisted with LLM
I tried a bit of LLM assistance and it is amazing: instead of writing hundreds of regular expressions (which I'm experienced at), a simple question to the LLM API will often get you what you need.
With the help of structured output helpers like instructor, productivity is greatly improved; the only concern is cost, so I will adopt a multi-vendor strategy to slow cash outflow.
Next: The API and Web App
I'm still thinking about the tech stack; I want it to be simple, lightweight, and scalable. I'm leaning towards HTMX+Alpine while gathering more feedback on nicegui.
One certainty is I'm starting to build the web API with FastAPI and will replace the legacy Flask-based deal library API.
2025Q2 Update
2025-08-01
#### Update about the update
It's worthwhile to send out the heartbeat to the community to keep confidence afloat; I'll try to note what happened in Hastructure & absbox on a quarterly basis.
Python Regression Test
I've included code-based regression tests in the test-suite. The old JSON-based cashflow comparisons will be sunset because they produce too much noise.
Migration from Jupyter to marimo
It's great: marimo can be served as a notebook for exploratory research, as a script, or even as an App!
Adopting marimo will replace many notebooks in the docs and will be used in the backend deal library (which will phase out htmx-alpine). This lets me be relieved from some web development tasks.
The pilot development will rebuild this website (absbox.org).
Stack & Nix
Even with help from Stack and GHCup, there is still friction when installing different versions and managing dependencies. I chose Nix as the final solution and climbed the learning curve; it worked well after I installed it on two laptops running NixOS and resolved a couple of driver issues.
The benefits:
Enterprise users feel more comfortable building from source if they choose
Nixas the package manager; now it's a one-liner to buildHastructure.I'm more relaxed about updating dependencies for
Hastructure.
As of Aug 1, Hastructure is on stackage and should be easy to install via stack; hopefully it will appear in nixpkgs as well.
Welcome new friend !
2025-01-10
Happy New Year 2025!
- I'm excited to announce the first great news from absbox this year!
- @algoritmica.ai has started commercially supporting absbox.org. This development targets institutions interested in structured finance cashflow models, providing enhanced analytical capabilities in the ABS/MBS space.
- With commitment from @algoritmica.ai, this initiative is expected to bolster development and efficiency of in-house cash flow models for users. Users can utilize all capabilities of absbox for structuring, surveillance, and trading.
- The startup is helping onboarding for absbox and acts as a long-term growth partner in areas like large language models and collateral data management.
- For more information, visit @algoritmica.ai or contact their support team.
- Let's get the new year started!
Global tour: Australia Melbourne/Sydney
2024-12-30
2024-12-30 -> 2025-01-08 in Melbourne and Sydney
- Onboard Workshop on Absbox/Hastructure
- installation/deployment
- cashflow modeling
- stress testing
Early booking via Email to support@asset-backed.org