Why is the Westpac share price falling for a fourth consecutive day?

The Westpac Banking Corp (ASX: WBC) share price is tumbling on Thursday, down 4.12% to $30.48 at the time of writing.

Westpac is significantly underperforming its ASX 200 bank share peers and the broader market today.

The S&P/ASX 200 Index (ASX: XJO) is currently…