Financial Identifier Guides
Expert guides on securities identifiers, conversion methods, and best practices
Financial Identifier Conversion: The Complete Guide
Every identifier type explained. Conversion matrix, comparison tables, and practical advice for choosing the right identifier for your use case. 15 min read.
How to Convert ISIN to WKN
Step-by-step ISIN ↔ WKN conversion with real German stock examples, Luhn algorithm walkthrough, and common pitfalls.
8 min read →ISIN vs CUSIP: Key Differences
Detailed comparison of the world's two most important securities identifiers. Structure, usage, licensing, and conversion.
10 min read →How to Find the ISIN for Any Stock
Free databases, exchange websites, broker platforms, and APIs. Find ISINs for US, German, UK, Swiss, and Japanese stocks.
9 min read →German Securities Identifiers: WKN & ISIN
Complete guide to Germany's dual-identifier system. History, structure, DAX 40 reference table, and broker lookup tips.
11 min read →US Stock Identifiers: CUSIP, ISIN, FIGI
Complete US identifier ecosystem: ticker, CUSIP, ISIN, FIGI, CIK. Which goes where, licensing costs, and conversion methods.
10 min read →What Is an ISIN Number? The Complete Guide
Everything about the International Securities Identification Number — structure, country codes, check digits, how to find one, and what securities have ISINs.
15 min read →CUSIP Number: Complete Guide & Free Lookup
How CUSIP numbers work, where to find them, check digit algorithm, 40+ examples of popular stocks and ETFs, and CUSIP-to-ISIN conversion.
12 min read →ISIN to Ticker: Complete Conversion Guide
How to convert between ISIN and ticker symbols. Free tools, APIs, manual methods, and 50+ example mappings for popular stocks and ETFs.
14 min read →SEDOL vs ISIN: Differences & Conversion
Complete comparison of SEDOL and ISIN. How they relate, when to use each, algorithmic conversion for GB securities, and real-world examples.
12 min read →Complete SEDOL Lookup Guide
UK's SEDOL identifier explained. Structure, check digit algorithm, FTSE 100 reference table, and ISIN conversion.
8 min read →Swiss VALOR Number Guide
Switzerland's VALOR system explained. SMI reference table, SIX Financial Information, ISIN conversion, and banking usage.
7 min read →ISIN Check Digit Validation
Technical deep-dive into the Luhn algorithm for ISINs. Step-by-step calculation, implementation bugs, and working code.
9 min read →LEI vs ISIN: Entity vs Security
Understanding the difference between entity identifiers (LEI) and security identifiers (ISIN). MiFID II, EMIR, and GLEIF.
8 min read →What Is a WKN? Germany's Securities Number
The Wertpapierkennnummer explained: structure, history, how it embeds into German ISINs, and WKN examples for BASF, SAP and Siemens.
10 min read →FIGI Explained: The Open Identifier
The Financial Instrument Global Identifier: structure, granularity levels, the free OpenFIGI API, and how FIGI compares to ISIN and CUSIP.
10 min read →ISINs for ETFs and Funds
Why fund ISINs matter more than tickers: share classes, IE/LU domiciles, accumulating vs distributing, and finding the right ISIN.
10 min read →Bond ISINs: Fixed-Income Identifiers
One issuer, many bonds: how bond ISINs work, the XS prefix for eurobonds, government bonds, and reading a bond description.
10 min read →How to Get an LEI: Registration Guide
Who needs an LEI, how to register step by step, typical costs, renewal, and what happens when an LEI lapses.
10 min read →Ticker Symbols: Why One Stock Has Many
Exchange-specific tickers, suffix conventions (Yahoo, Reuters, Bloomberg), ADRs, class shares, and why tickers are unstable identifiers.
10 min read →How ISINs Are Assigned: NNAs & ANNA
The ISO 6166 process behind every ISIN: National Numbering Agencies, ANNA, the XS substitute code, and when ISINs change.
10 min read →ISIN Country Codes Decoded
What the first two letters really mean — and why Alibaba's ISIN starts with US. Full prefix table from US to XS.
10 min read →CUSIP vs SEDOL vs VALOR vs WKN
The four big national numbering systems compared: structure, issuers, check digits, and how each embeds into the ISIN.
12 min read →Do Cryptocurrencies Have ISINs?
Why Bitcoin has no ISIN but crypto ETPs do, the Digital Token Identifier (ISO 24165), and identifiers for tokenized securities.
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