Likewise, I'd not say that it's 'most' of their money, but pretty much every bank I know of will happily take the opposing position to their clients. In many ca

Likewise, I'd not say that it's 'most' of their money, but pretty much every bank I know of will happily take the opposing position to their clients. In many cases though, this is just the bank providing the market to their clients, especially in the cases of less liquid products.