Why Banks Won't Hurt and Only You Hurt

During the time when we open up the gold account with a local bank in Malaysia. They've a good spread of RM2 for their buying and selling.

Recently we've seen the movement of gold increase as we've expected. But we only see the selling price gone up and not the buying price. Their spread increase to a high of RM10 differences.

When the price is up, they don't up their buying price so fast and when the price drops, they quickly reduce the buying price. For selling price, it goes another way.

It potentially hold you to your position and you can only profit from it when there's a very big differences in the price movement which they're not able to use spread to control. This is true for not only gold but also some other asset class such as forex, etc.

So who's the losing one?