Why Ticker Symbols Break Your Dataset
Ticker symbols break datasets in four ways: renames, reuse, share class punctuation, and mergers. See why each corrupts a join, and what to key on.
#symbology
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How to Read a Futures Symbol (ESZ6, CLF27)
Read any futures symbol on sight: root, month code, year digit. Worked examples for ESZ6, CLF27 and ZCK6, the full month table, and two traps to avoid.
How to Read an Options Symbol (OSI Format)
How to read an options symbol: decode the OSI root, expiry, call or put flag and eight-digit strike, plus adjusted roots, SPXW and why 00007500 is $7.50.