HSBC Holdings PLC's stock plummeted 5.01% in Wednesday's trading session following the release of its disappointing second-quarter results. The banking giant reported a 29% drop in Q2 net profit, falling short of analyst expectations and raising concerns about its performance in key markets.

The steep decline in profit was primarily attributed to a $2.1 billion loss related to HSBC's stake in China's Bank of Communications. This included a $1.1 billion loss from the dilution of its stake and a $1.0 billion impairment charge. Additionally, the bank faced higher expected credit losses of $1.1 billion, partly due to its exposure to Hong Kong's troubled commercial real estate sector.

Despite these challenges, HSBC announced plans to initiate a new share buyback program of up to $3 billion. However, investors remained cautious as the bank warned that the impact of U.S. trade tariffs could potentially cause it to miss its profitability targets in the coming years. The combination of weakening performance in China, credit impairments, and global economic uncertainties has clearly rattled investor confidence in HSBC's near-term outlook.