THE job of an economist, among many other duties, is to put things into perspective. So, because I am an economist, among other duties, here is a little perspective on the recent turmoil in the stock and bond markets.

First, when the story of this turbulence is reported, the usual explanation mainly has to do with some new loss in the subprime mortgage world — the universe of mortgages and mortgage-backed instruments related to buyers with poor credit histories or none at all.

Here is the first instance in which proportion tells us that something is out of whack:

The total mortgage market in the United States is roughly $10.4 trillion. Of that, a little over 13 percent, or about $1.35 trillion, is subprime — certainly a large sum. Of this, nearly 14 percent is delinquent, meaning late in payment or in foreclosure. Of this amount, about 5 percent is actually in foreclosure, or about $67 billion. Of this amount, according to my friends in real estate, at least about half will be recovered in foreclosure. So now we are down to losses of about $33 billion to $34 billion.

The rate of loss in subprime mortgages keeps climbing. In time, perhaps it will double, maybe back to $67 billion. This is a large sum by absolute standards, and I would sure like to have it in my bank account.