New Delhi, April 22 -- Adani Ports and Special Economic Zone Ltd's stock has had a rocky few days. It plunged over 7% after a tariff-related scare, only to rebound just as fast once the move was paused. Now, it's taken another hit-this time over a high-stakes, related-party acquisition.

On Thursday, the Gautam Adani-promoted company said it would acquire Abbot Point Port Holdings Pte Ltd, the parent of North Queensland Export Terminal (NQXT), for AUD 3.98 billion (approximately Rs.21,783.33 crore). The seller? Carmichael Rail and Port Singapore Holdings Pte Ltd-a Singapore-based entity controlled by the Adani family.

The deal will be funded by issuing 143.8 million equity shares, effectively transferring ownership of the Australian coal...