Closing Bell: Crude Rallies to Four-Week High; U.S. Stocks at Records

It was another record-making trifecta for Wall Street with stocks getting a big boost from another crude rally. Hopes of an OPEC production freeze agreement sent oil to its best level in nearly four weeks.  Chesapeake Energy (CHK) - Get Report spiked after arranging a $1 billion five-year loan intended to repurchase senior notes due from next year through to 2038. The natural gas producer expects the tender to improve its financial flexibility.  Best Buy (BBY) - Get Report was downgraded to HOLD from BUY at Jefferies with its price target cut by $3 to $36. Analysts said the revision was driven by concerns over a maturing 4K TV cycle.  AIG (AIG) - Get Report was slightly higher on reports it is close to selling its mortgage insurance unit for $3.4 billion. AIG had previously looked into a possible float of the division.