World-Beating 55,000% Surge in India AI Stock Fuels Bubble Fears

The world’s best-performing stock is turning into a cautionary tale for investors chasing outsized returns from the AI boom. From a report: Little-known until recently even within its home market of India, RRP Semiconductor Ltd. became a social-media obsession as its shares surged more than 55,000% in the 20 months through Dec. 17 — by far the biggest gain worldwide among companies with a market value above $1 billion.

That’s despite posting negative revenue in its latest…