CATL, the world’s largest maker of electric-vehicle batteries, is expanding production, while Honda is cutting spending plans. Oddly, both stocks are up.

Chinese battery giant Contemporary Amperex Technology’s shares soared Tuesday in their Hong Kong debut, marking the world’s largest equity offering so far this year. A successful listing of CATL, as the company is known,

Shares in CATL closed 16% higher on their Hong Kong debut on Tuesday after the Chinese electric vehicle battery giant raised $4.6 billion in the world's largest listing this year, boosting prospects for equity sales by Chinese companies.