Over the course of our 2023 fiscal year, an extraordinary confluence of events impacted the global capital markets in ways not experienced in decades. Against a backdrop of significant geopolitical turmoil, high inflation and rapid interest rate increases, the S&P 500, the S&P/TSX and the MSCI World indices posted negative returns of -7.7%, -5.2% and -7.0% respectively over the 12-month period.
When confronted with persistent headwinds, the business mix that helped us deliver record performances in prior years performed in line with our expectations, with contributions from wealth management and M&A advisory helping to offset the dramatic reduction in capital raising activity.
While our financial performance for the fiscal year fell below our targets, our multi-year strategy to diversify our business mix and reduce our reliance on underwriting activities contributed to our resilience, protecting our capacity to deliver differentiated services for our wealth management and capital markets clients in all our geographies.
Firm-wide revenue for the fiscal year amounted to $1.5 billion, a decrease of 26% when compared to the record achieved in the prior fiscal year. Excluding significant items(1), pre-tax net income amounted to $125.9 million, which translated to diluted earnings per share(1) of $0.59.
Several factors impacted our profitability over the fiscal year. Shortly after the onset of the global market downturn, we experienced sharp declines in the value of certain inventory and warrant positions earned in respect of our investment banking activities, which primarily impacted first quarter results in our Australian capital markets business, and, to a lesser degree, our Canadian business. Beginning in the third fiscal quarter, our quarterly interest expense increased as we continued our strategic activities, and our cost of financing increased.
We also recorded increased provisions and professional fees in our fourth quarter.