April 24 (Bloomberg) -- A new index of derivatives tied to commercial mortgage bonds may be roiled by concerns that the underlying loans represent the ``peak of aggressive underwriting,'' Citigroup Inc. analysts said.
The third version of the so-called CMBX index is likely to cost investors between $70,000 and $90,000 more a year to protect lower-rated bonds in the index from default, Citigroup analysts led by Darrell Wheeler in New York said in a note last week. The credit-default swap index is widely used to speculate on the ability of property owners to repay their debt.
The increase in price comes after Moody's Investors Service this month stoked concerns about risk in the $797 billion market for bonds backed by mortgages on apartment buildings, offices and other commercial properties. Moody's said April 11 it would require more protection for investors before rating new issues because of a ``steady erosion in underwriting quality.''
That declining quality is ``likely to focus the market's attention exactly on those deals that the CMBX.3 references,'' the Citigroup analysts said.
The new index, based on $3.4 billion in securities, is scheduled to begin trading tomorrow.
``The new index will likely trade wider both because of the perceived reduction in underwriting quality and increased leverage and also because of an increase in hedging demand that typically flows to the on-the-run index,'' said Carl Bell, team leader for structured credit at Putnam Investments LLC in Boston, which manages $63 billion in fixed-income assets.
The perceived risk of bonds in the current indexes started rising in February as some hedge funds and other investors that were betting on a deteriorating housing market began speculating on the commercial mortgage market.
A credit-default swap based on $10 million in debt included in the lowest investment-grade portion of CMBX.2 is up by $140,000 since late February to $215,830 today, according to composite prices from London-based Markit Group Ltd., the index administrator. To protect similar-rated bonds in the CMBX.3, it may cost investors $310,000 based on ``indicative levels'' of last week, the analysts said in the April 20 note.
At that level, the low-rated portion of the index would be trading as if it were downgraded to junk, or to BB+ from BBB- on the Standard & Poor's scale, the Citigroup analysts said.