As credit card chargeoff rates have risen, so has the market for  securities backed by charged-off credit card bills. 
This week Chase Manhattan Corp.'s securities unit is hawking $147.5  million in receivables from a debt collector called Commercial Financial   Services Inc. The deal is the largest of a growing number offered in the   last few months.     
  
Investor interest in these securities, rated "A" by Standard & Poor's,  is said to be so strong that the size of the offering was increased. Spread   information was not available, but previous deals have sold for 215 basis   points above U.S. Treasury notes.     
Now that investors are demonstrating they will buy these short-term  securities backed by distressed, unsecured consumer loans, analysts expect   banks and finance companies to tap the asset-backed market frequently as   more loans go bad.     
  
Credit card issuers charged off $17.5 billion of accounts in 1996,  according to Duff & Phelps Credit Rating Co., and over half that volume is   suitable for securitization, the agency said.   
Should the market approach $9 billion in volume, it means charged-off  credit card securities would become nearly as big as the market last year   for securities backed by government-guaranteed student loans, according to   Prudential Securities.     
Buyers of these unconventional securities are mainly mainstream  insurance companies, said Duff & Phelps analyst Christopher Donnelly,   adding, "Maybe it's for the little more adventurous."   
  
The deals begin when a debt collector buys a large block of defaulted  credit card bills from a bank for pennies on the dollar. A $1 billion   portfolio might fetch $10 million, Mr. Donnelly suggested. Anything the   company can then collect over the purchase price is worth its while.     
The risk to investors, said Prudential Securities analyst Thomas  Zimmerman, depends on the ability of the issuer to recover enough bad loans   to support the securities.   
The leader in this field is Commercial Financial Services of Tulsa,  Okla. The firm got its start buying nonperforming loans from the FDIC and   Resolution Trust Corp. It began buying distressed credit card receivables   from banks in 1995, and now has $4.4 billion worth on its books.     
Commercial Financial buys bad loans from banks at predetermined rates  and packages the receivables into securities to finance its collection   operation.   
  
Securitization is now an important fund-raising source for the company,  which is expected to sell addition charged-off credit card receivables via   Chase Manhattan later this year. u   
Investors have been getting uneasy with conventional credit card  securities after Advanta Corp. reported losses. 
Spreads of some mainstream credit card securitizations widened by three  or four basis points after Advanta's problems came to light, Mr. Zimmerman   said.   
But evidently these jitters were temporary: Traders say spreads have  tightened to within two basis points.