These were some of the biggest movers and shakers on Wednesday: Stock gainers:
Occidental Petroleum Corp.’s stock
OXY
rose 0.7% after filings disclosed that Warren Buffett’s Berkshire Hathaway Inc. had upped its stake in the energy company by 6 million shares, taking its total to over 200 million shares worth more than $12 billion. Berkshire’s
BRK
…
