Hey there,
I think just overall weakness and uncertainly about the regional banking situation in the US. After First Republic's failure over the weekend, a few more today made big drops and had to be halted. SO that uneasiness combined with the US Feds interest rate decision upcoming + fears of a recession...all playing a factor on Canada's financial sector as well since we are so interconnected. I wouldn't worry too much about daily fluctuations like this.
Mta