16 lines
446 B
Python
16 lines
446 B
Python
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from __future__ import annotations
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import re
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_SUFFIX_RE = re.compile(r"(?:_US)?(?:[a-z])?_EQ$")
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def _normalise_ticker(raw: str) -> str:
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"""Strip T212's exchange-suffix decoration from a ticker.
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T212 tags every ticker with `_EQ`, optionally preceded by a lowercase
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letter ("l" for LSE) or `_US` for a US listing. Peel those off so the
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symbol matches what Schwab / InvestEngine emit.
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"""
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return _SUFFIX_RE.sub("", raw)
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