You have the Personal Finance and Quantitative Finance sites. One seems to be designed for finance question of the general public, while the other focusses more on the quant level/PhD level.
When I asked a question from CFA curriculum, it was put on hold, and I was told it was not "quantitative finance" because it wasn't mathematical enough.
You can't get more finance than CFA since it is the industry standard. So where on Stack Exchange could I ask such finance questions?