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By Charles Levinson
NEW YORK, March 31 (Reuters) - Wall Street banks appear to be routinely mispricing corporate bond issues, potentially costing U.S. companies billions of dollars in excess interest payments, according to a new study by London-based research firm Fideres.
Fideres said it analyzed more than 700 bond issuances between 2010 and 2015, and found that, on average, U.S. corporate bond prices rose over 0.50 percent in the first few days after hitting the market. In comparison, bonds issued by banks rose just over 0.30 percent on average, according to Fideres.
The gains in corporate bond prices reflect strong investor demand for the issues, which in turn suggests that the yields may be overly steep. The higher the yield, the higher the interest payment for the corporate issuer.
Fideres said mispriced bonds cost the issuers of the 700 corporate bonds it studied an estimated $2 billion in excess interest payments. The firm estimated that mispriced bonds cost the whole U.S. corporate bond market as much as $18 billion during the five-year period.
"When banks advise corporate clients, the bonds are systemically underpriced," said Alberto Thomas, a former fixed income derivatives banker at UBS and now a partner at Fideres. "But when they do their own bonds, they seem to know exactly where to price them."
To be sure, banks are among the biggest issuers of bonds and so there are many benchmarks to refer to when setting yields. Non-financial companies tend to tap the debt market less frequently, so setting yields are not as straightforward.
The U.S. corporate bond market has ballooned to more than $1.5 trillion worth of issues last year, from $666 billion in 2002, according to the Securities Industry and Financial Markets Association, as companies took advantage of record low interest rates to raise money.
The fees banks have generated for advising and underwriting new corporate bonds have swollen to more than $16.4 billion last year, from $7.6 billion in 2002, according to Thomson Reuters data.
Fideres said banks may be torn between trying to please the companies issuing the bonds and the investors buying the bonds. When the price of a corporate bond jumps in value after hitting the market, the bondholders score quick and easy profits.
Many big bond investors are among the banks' largest and most valued clients, whereas most companies who issue bonds do so infrequently though they pay lucrative advisory fees.
Fideres' past research projects have been used in class action suits against banks. The firm's mining of market data have helped plaintiffs score over $30 billion in settlements against banks over the alleged rigging of markets in foreign exchange, credit default swaps, precious metals, and other key financial benchmarks.