Evening Wrap: ASX 200 dumps 133 points as WBC and NAB tumble, Middle East conflict saps investor confidence again – Market Index

The S&P/ASX 200 declined by 133 points on May 8, 2026, as investor confidence weakened under the pressure of geopolitical tensions and significant losses within the banking sector.

The downturn represents the most significant decline for the index since March 2026. Reports on the total market value lost during the dive vary, with the Australian Financial Review reporting a $50 billion wipeout, while SMH.com.au estimated the loss at $40 billion.

Banking Sector Volatility

A primary driver of the market slide was the performance of major financial institutions. Both Westpac (WBC) and National Australia Bank (NAB) experienced sharp declines, contributing to the broader index drop.

Adding to the volatility, The Australian reported that Westpac has delayed its decision regarding a potential rate hike.

Geopolitical and Commodity Pressures

Market Index attributed the decline in investor confidence to the ongoing conflict in the Middle East, which has exerted downward pressure on the index.

The market also reacted to climbing oil prices. According to reporting in The Australian, Macquarie analysts suggested that the current oil shock could persist throughout the year.

Individual Stock Performance

Beyond the banking sector, other individual equities saw steep losses. Tabcorp shares fell 14% during the session, according to the Australian Financial Review.