Wachovia Corp., a fairly infrequent issuer of debt into the capital  markets, joined the fray on Monday by selling $250 million in 30-year   notes.   
With a 10-year put option, the latest issue from the Winston- Salem,  N.C.-based bank follows issues of debt with similar structures in the past   year by in-state rivals First Union Corp. and NationsBank Corp.   
  
The structure generally reflects the belief among a number of bankers  that coupon rates on bonds have reached a low point. 
Investors demand a smaller coupon on a deal with a put option than they  would for a straight deal that matures at the same time as the put, because   the put option gives them greater flexibility.   
  
Investors in the Wachovia deal, for instance, can exercise the put in 10  years to secure greater return in other investments if bond rates have   risen. If bond rates fall below their current level in 10 years, investors   can hold on to the Wachovia bonds until maturity, locking in greater return   than they otherwise would get.       
"Banks can reduce their initial funding costs at least to the put date,"  said a bank treasurer. 
"The risk is that you have debt on your books that is relatively  expensive money if rates are lower (at the put date)." 
  
Banks seem prepared for this risk because of the currently low yield  environment and high interest among investors, said Robert McCoy,   Wachovia's chief financial officer.   
"We were taking advantage of a time when both were in synch for us," he  said. 
John E. Mack, the treasurer at NationsBank, said that investors tend to  drive the type, or structure, of deals in the market at any time. 
"Most deals are driven by the supply as opposed to the demand," said Mr.  Mack. "I don't think the banks are going out there and saying they want to   do this."   
  
Mr. Mack said that, for the most part, the risk of such debt deals is  not outsize for any of the issuing banks. 
"In the scheme of things," said Mr. Mack, "for NationsBank, Wachovia,  and First Union, the amount of money doesn't have that much effect." 
Wachovia's deal was priced at par to yield 6.605%, and is puttable at  par in the 10th year. 
The deal is priced at a spread of 47.5 basis points over Treasuries, and  is rated AA-minus by Standard & Poor's Rating Group and A1 by Moody's   Investors Service.   
The deal closes out Wachovia's shelf registration with the Securities  and Exchange Commission. To issue more debt, it would have to file a new   notice with the SEC.