"FRANKFURT -- A key measure of estimating the value of subprime mortgage-backed securities may be overstating potential losses of triple-A securities by more than 60%, according to the Bank for International Settlements, which puts its own estimate of such losses at $73 billion.
The BIS, often called the central bankers' central bank, has few formal banking duties but is a hub for economic and monetary research as well as for global policy makers. Its most recent quarterly report adds to growing criticism of a key measure of the subprime-mortgage market called the ABX.
Launched more than two years ago by Markit Group Ltd., the ABX is an index that tracks the value of securities backed by subprime loans. ABX is based on credit-default swaps: actively traded instruments that insure against default on the securities.
The index often is used by banks and other organizations as a proxy for the value of mortgage-backed securities. Echoing other concerns, the BIS says the ABX prices may be unreliable because the indexes only cover a small percentage of the market.
Some observers also contend that ABX prices have been driven lower largely by bearish traders.
The BIS also says the ABX indexes may misrepresent the structure of the securities they claim to reflect. The specific triple-A securities referenced by the index, in the case of a default, would be paid only after all other triple-A obligations had been met. Recalculating with new data for triple-A securities that would get paid faster, the BIS says the ABX overestimates triple-A losses by 62%.
The BIS says the value of subprime mortgage-backed securities outstanding issued from 2004-07 is about $600 billion. At the end of May, the report says, ABX prices suggested a value of about 59 cents on the dollar for such securities, indicating losses of about $250 billion, almost half of which -- $119 billion -- would come from triple-A securities.
Under the BIS's new calculations, losses on triple-A securities total only $73 billion. That would bring the total subprime-mortgage-related losses down some 18%, to $205 billion."
http://online.wsj.com/article/SB121295844265255355.html?mod=hps_us_whats_news
Finally the press is coming around. But then, the story was here a couple of months before the street picked up on it.
http://aaronandmoses.blogspot.com/2008/04/markitcom-markdown.html
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