By Emre Peker June 4 (Bloomberg) — Calpine Corp. , the largest U.S. generator of natural-gas-fueled electricity, and at least five more borrowers are being forced to boost interest rates on proposed loans after the market’s worst month since 2008. The margin Calpine offered to pay over lending benchmarks for a $1.3 billion loan increased by as much as 2 percentage points to 5.5 percentage points, while the remaining companies had to raise rates from 0.75 percentage point to 4.5 percentage points, according to people familiar with the talks who declined to be identified because the terms weren’t set. For Houston- based Calpine, that’s an extra $26 million a year in interest. Prices of high-yield, high-risk loans fell 3.89 percent during last month as measured by the S&P/LSTA U.S. Leveraged Loan 100 Index as investors fled all but the safest government securities amid growing concern that rising budget deficits in Europe will cause the global economy to slow. The selloff created bargains among existing debt, reducing the attractiveness of new loans. “There’s a lack of desperation to buy new issue, it’s got to be compelling in terms of price and structure,” Jeff Cohen , a managing director of loan capital markets at Credit Suisse Group AG in New York, said in an interview. “Investors are being much more choosy, they’re seeing compelling opportunities in the secondary market that were not available prior to the recent market turbulence.” ‘Opportunity to Re-Price’ Styron Corp., the Dow Chemical Co. unit that Bain Capital LLC is buying, R3 Treatment Inc., Spectrum Brands Inc., Awas Aviation Capital Ltd. and U.S. Gas & Electric Inc. also offered more yield by proposing higher interest on loans, among other things, according to data compiled by Bloomberg. “The loan market is taking the global events and volatility in other risk markets as an opportunity to re-price deals,” Erik Falk , co-head of leveraged credit at KKR & Co.’s asset management unit with more than $13 billion in assets under management, said in an interview. Elsewhere in credit markets, the Federal Reserve said that U.S. commercial paper outstanding fell to the lowest on record, led by overseas financial issuers, bonds of BP Plc rose the most on record and the new issue market in the U.S. and Europe suggested signs of thawing. Derivatives indexes show greater confidence among investors to own corporate bonds, while emerging-market debt rallied. Short-Term IOUs The U.S. market for short-term IOUs, commercial paper, declined $10.2 billion to $1.06 trillion in the week ended June 2, the lowest since at least 1999, data compiled by Bloomberg show. Without seasonal adjustment, debt outstanding fell $5.5 billion, the fifth straight week of declines, to $1.05 trillion, also the lowest on record. In Europe, financial companies’ overnight deposits with the European Central Bank rose to a record yesterday. They’re wary of lending to each other during the continent’s sovereign debt crisis. Banks placed 320.4 billion euros ($389.9 billion) in the ECB’s overnight deposit facility at 0.25 percent, compared with 316.4 billion euros on June 2, the central bank said. That’s the most since the introduction of the euro in 1999. “The news flow over the past few weeks has spooked banks and since nobody knows how exposed individual financial institutions are, it’s deemed safer to park cash with the ECB rather than lend,” said Norbert Aul , an interest-rate strategist at Commerzbank AG in London. BP Rebounds BP’s 4.75 percent notes due in 2019, issued by the company’s finance unit, increased 3.5 cents to 93.68 cents on the dollar in New York, according to Trace, the bond price reporting system of the Financial Industry Regulatory Authority. The debt fell to 90.1 cents on June 2, its lowest ever, amid concern about liabilities the company may face from the worst oil spill in U.S. history. “Investors are starting to get their hands around the potential exposures the spill companies may have,” said Joel Levington , managing director of corporate credit at Brookfield Investment Management Inc. Analysts expect BP can maintain its dividend, “which should be reassuring to the credit side,” Levington said. Rising investor confidence was reflected in the Markit CDX North America Investment Grade Index Series 14, which investors use to hedge against losses on corporate debt or to speculate on creditworthiness. The index dropped 0.4 basis point to a mid- price of 117 basis points in New York, according to Markit Group Ltd. The index typically falls as investor confidence improves and rises as it deteriorates. In Asia, bond risk rose today. The Markit iTraxx Asia index increased 2 basis points to 135 basis points, BNP Paribas SA prices show. The Markit iTraxx Japan index rose 1 basis point to 141, according to Morgan Stanley. European Sovereign CDS Credit-default swaps on European sovereign debt rose, with contracts on Spain jumping 9 basis points to 265, Portugal adding 12 basis points to 351 and Greece climbing 28 basis points to 745, according to CMA DataVision prices. The Markit iTraxx SovX Western Europe Index of swaps on 15 governments widened 4 basis points to 157.5, compared with the record-high 167.2 on May 6. The contracts pay the buyer face value if a borrower fails to meet its obligations, less the value of the defaulted debt. A basis point equals $1,000 annually on a contract protecting $10 million of debt. The new issue market is starting to open, while company bond sales globally total $9.54 billion this week, compared with $18.2 billion during the period ended May 28, according to data compiled by Bloomberg, Bank of Montreal , the fourth-largest Canadian bank, sold $2 billion of five-year covered bonds to lead $5.1 billion of issuance in the U.S., Bloomberg data show. Air Liquide SA , the world’s biggest producer of industrial gases sold the second European benchmark corporate bond since April, following German railway company Deutsche Bahn AG’s offering on June 2. Narrower Spread Air Liquide sold 500 million euros of 10-year notes yielding 90 basis points more than the benchmark swap rate, narrower than the 100 basis-point spread first offered to investors, said a banker involved in the deal. In emerging markets, bond spreads shrank 6 basis points on average to 308, the narrowest since May 17 and down from last month’s high of 346 on May 20, according to JPMorgan Chase & Co.’s Emerging Market Bond index. Junk bond spreads were at 693 basis points, 151 basis points wider than this year’s low on April 26, according to Bank of America Merrill Lynch’s US High Yield Master II Index . Spreads in the leveraged loan market widened less than the speculative-grade bond market. High-yield debt is rated below Baa3 by Moody’s Investors Service and BBB- by Standard & Poor’s. ‘Financial Instability’ The S&P/LSTA 100 Index dropped 3.61 cents, or 3.89 percent, in May to 89.11 cents on the dollar, the most since falling 7.58 cents, or 10.71 percent, in November 2008. The average spread to maturity over the three-month London interbank offered rate for the most actively traded loans climbed 1.02 percentage points to 4.46 percentage points, after reaching the lowest level in almost two years on April 15, according to S&P Leveraged Commentary and Data. Libor, the rate banks charge to lend to each other, was set yesterday at 53.78 basis points, or 0.537 percent, up from its record low of 24.88 basis points in February. Moelven Industrier ASA , a Norwegian forest products supplier, refinanced 1.05 billion kroner ($162 million) of loans with a five-year revolving credit line, extending maturities from July 2011, the company said in a statement . Moelven agreed to pay higher interest for the loan, adding 10 million kroner a year to total financing costs, it said. “Financial instability has contributed to a tightening of credit markets,” Moelven President Hans Rindal said in the statement. “The risk of such unstable market conditions arising is the reason” for the refinancing, he said. Bank Flexibility In the U.S., Styron canceled a $125 million second-lien debt deal and increased the capacity of its $675 million first- lien loan to $800 million. It also boosted the margin over Libor to 5.5 percentage points, from 4.75 percentage points. Deutsche Bank AG is arranging the financing, which may be sold at 98.5 cents to 99 cents on the dollar and backs Styron’s $1.63 billion buyout by Boston-based private equity firm Bain. U.S. Gas & Electric, the North Miami Beach, Florida-based retail energy marketer, offered lenders an all-in rate of 14 percent on the $125 million second-lien term loan it is seeking. The company had previously proposed to pay 7.5 percentage points to 8.5 percentage points more than Libor, with a 2 percent floor on the lending benchmark. “Many of the new issue loans are the syndication of deals banks had underwritten,” KKR’s Falk said. “The banks are using flexibility they have and working with investors to find levels that clear the market so they can move the loans and de-risk their balance sheets.” Leveraged loans fell as low as 88.71 cents on May 25 before climbing above 89 cents last week. The S&P/LSTA 100, which tracks the 100 largest dollar-denominated first-lien leveraged loans, rose June 3 by 0.16 cent to 89.07 cent on the dollar. “Given the broad calming in the credit markets, it seems like cash loans are starting to find a floor,” said Alex Stromberg , head of U.S. par-loan trading at Barclays Capital, said in a telephone interview from New York. “We would like to see some more stabilization in the high yield bond market before more real-money players start to come back into the loan market.” To contact the reporter on this story: Emre Peker in New York at epeker2@bloomberg.net