AIA Group's stock price plummeted 5.06% during intraday trading on Monday, following the company's announcement of plans for a significant debt issuance.

The Hong Kong-based insurer applied to list an $18 billion global medium-term note programme on the Hong Kong stock exchange. This programme, which would be the largest on record for the company according to data, is intended for issuing debt securities to professional investors only and is expected to become effective imminently.

Market reaction to the substantial debt issuance plan appears negative, with investors potentially concerned about the implications for the company's balance sheet and financial strategy. The announcement of such a large capital-raising initiative often leads to selling pressure as traders assess the impact on shareholder value and future earnings.