What caused the sharp decline in short interest for CATL's Hong Kong shares, and how low did it fall?

The sharp decline in short interest was driven by CATL’s $5 billion share sale last week, which increased share availability for shorting and eased borrowing costs, prompting traders to unwind bearish positions; short interest fell to 15.4% of free float as of Monday — the lowest since December and down from about 26% a week earlier, according to S3 Partners data.

Why had short interest in CATL’s Hong Kong shares been unusually high over the past year, despite strong stock performance?

Short interest built up over the past year due to an unusually high premium on CATL’s Hong Kong shares relative to its cheaper Shenzhen-listed shares — a gap that attracted traders to go short on Hong Kong shares while holding bullish positions in Shenzhen, even though direct arbitrage was not possible; this occurred as the Hong Kong stock more than doubled since its debut last year.

CATL Bears Retreat in Hong Kong After Blockbuster Share Sale

May 5, 2026

Short sellers retreated from CATL following a $5 billion share sale, reducing short interest to its lowest level since December. Investor sentiment remains positive driven by growth expectations in battery energy storage and new technologies like sodium-ion.

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