Which are the best affiliate networks for financial products?
Try BOAElite. They are one of the best in the market. If you can get sales to their products then you will earn atleast $100-$200 per sale that's for sure.
If you are looking for Shopping Affiliate and Money Management Affiliate programs then TurboTax Affiliate Program and coupons.com are the best options.
You can also go for 'Affiliate Finance'. Its good if your are looking for binary option brands.