Asian shares opened mixed on Thursday as market participants digested the news of renewed US airstrikes targeting Iran, a development that has heightened geopolitical tensions. The strikes, which were confirmed by US military officials, have raised concerns over potential retaliatory measures from Iran, contributing to a cautious trading atmosphere.

In Japan, the Nikkei 225 index fluctuated throughout the session, ultimately closing slightly lower as investors weighed the implications of the US military actions. The broader Topix index also reflected this sentiment, finishing in negative territory as traders sought safer assets amid rising uncertainty.

Meanwhile, Australia's S&P/ASX 200 managed to post modest gains early in the day, buoyed by stronger commodity prices. Analysts noted that Australia's resource-heavy indices could benefit from heightened demand for oil and metals in light of escalating conflict in the Middle East.

South Korea's KOSPI index, on the other hand, experienced volatility, mirroring the regional sentiment. Analysts suggest that the mixed performance across Asian markets underscores a cautious approach from investors, who are wary of how these geopolitical developments could impact global trade and economic stability.

Market experts indicate that the US airstrikes could have far-reaching consequences, not only in the Middle East but also in global markets, as investors assess the potential for disruptions in oil supply and further escalations in military engagements. “The markets are reacting to the uncertainty surrounding US-Iran relations, and there is a palpable sense of caution among traders,” said Jane Liu, a senior analyst at a regional brokerage firm.

While some sectors may benefit from the current situation, including defense and energy stocks, the overall sentiment remains fragile. Investors are advised to stay vigilant and monitor developments closely, particularly as the situation in Iran evolves and international responses unfold.

As trading continues, market participants are expected to recalibrate their strategies based on new information and shifts in the geopolitical landscape. The Asian markets will likely remain influenced by developments from the US and Iran in the coming days.