Generally, one point is equal to a quarter percent in rate. It's your choice. This is made necessary because the underlying market changes in fractions four times smaller than those commonly used for retail price quotes. Furthermore, the 60 Day or 30 Day points are pegged to a fixed forward point in time, and as that moment comes closer, the process of accretion, or time decay, exerts an influence which is reflected in the adjustments. You will notice that the grid does not include these types of loans, because the spreads shrink as the rates rise.
Investors pay less to lenders as the rates go higher and higher, until the return is negligible.
Market liquidity just dries up. They just can't get enough of a premium from their investors to cover the costs. Think about it. When you pay points, you are giving the lender a considerable sum of money. These funds could have been invested and made interest for you.