Why do the best discount deals vanish so quickly?
When a lender offers a particular special mortgage, it allocates a certain sum of money to be lent on a particular product. With particularly good deals, this first allocation may be taken up very quickly on a first come first serve basis. When this happens, lenders generally go back to the money markets to get another batch of funds for further lending. By the time this process is complete, economic or competitive circumstances may have changed enough so it is no longer possible to offer the original product.
