Natural-gas futures tumbled to their lowest level in nearly two years on unseasonably warm weather. • U.S. gasoline prices have declined for 88 straight days, the longest streak of falling prices on record.

China is investigating possible share-price manipulation amid the recent run-up in the stock market.

F-Squared admitted lying to investors about its track record and agreed to pay a $35 million settlement.

U.S. stocks rose for a fourth day, lifting the Dow and S&P 500 to records. The industrials climbed 154.64 to 17959.44.

Alstom pleaded guilty to a bribery scheme to win world-wide energy contracts and agreed to pay $772 million.

Ocwen shares plunged 27% after its chairman quit as part of a deal with New York’s financial regulator.

Russian regulators took over a leading retail bank amid reverberations from the nation’s currency crisis.

Morgan Stanley scotched a deal to sell an oil-trading and storage unit to Rosneft after failing to win U.S. clearance.

Existing-home sales dropped 6.1% in November to a six-month low despite stronger U.S. economic growth.

American Apparel put in place a shareholder-rights plan against unwanted suitors.

A Bristol-Myers drug to treat advanced skin cancer won FDA approval.