Offline decoder for ISO 10962 CFI (Classification of Financial Instruments) codes
Project description
cfi-decoder
Offline decoder for ISO 10962 CFI (Classification of Financial Instruments) codes.
How It Works
The decoder takes a 6-character CFI code and maps each position to human-readable descriptions:
- Position 1: Financial instrument category (e.g.,
E= Equities,D= Debt) - Position 2: Subcategory/group within that category (e.g.,
S= Shares for Equities) - Positions 3-6: Specific attributes based on the category-group combination
The decode() function returns a pipe-separated string of descriptions for each position.
Example
from cfi_decoder import decode
result = decode("ESVUFR")
# Output: "Equities | Shares (Common/Ordinary) | Voting | Free | Fully Paid | Registered"
Implementation
The decoder is implemented as a series of dictionary lookups against lookup tables defined in src/cfi_decoder/_data.py. The tables map CFI code characters to their human-readable descriptions for each position.
Models Used
This project was developed using Claude AI:
- Claude Opus 4.6
- Claude Sonnet 4.6
- Claude Haiku 4.5
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