Media Digest (5/21/2012) Reuters, WSJ, Financial Times

Alibaba buys back a 20% share held by Yahoo! (NASDAQ: YHOO) for a combination of cash and preferred shares worth $7.1 billion. (Reuters)

The heads of Samsung and Apple (NASDAQ: AAPL) will discuss a settlement to patent wars between the two companies over smartphone IP. (Reuters)

General Motors’ (NYSE: GM) Opel faces a harsh reaction from workers arising from plant closures. (Reuters)

Nasdaq (NASDAQ: NDAQ) will change its trading systems after trouble with the Facebook (NASDAQ: FB) IPO. (Reuters)

Google (NASDAQ: GOOG) says its has Chinese approval to buy Motorola Mobility (NYSE: MMI). (Reuters)

Dalian Wanda Group, based in China, will buy the AMC movie chain for $2.6 billion. (WSJ)

Greece’s conservative parties, which favor austerity, begin to show improvements in U.S. polls. (WSJ)

The European Union’s José Manuel Barroso says Greece should expect pressure over austerity to remain high despite indications otherwise from the G8 meeting. (WSJ)

Some accountants say that Chesapeake Energy (NYSE: CHK) costs misrepresent the firm’s financial position. (WSJ)

The G8 meeting and the opinions of EU leaders may press Merkel to allow Europe to aid some large banks in the region. (WSJ)

UK and US bank regulators prepare for any failure of several financial firms, which include Goldman Sachs (NYSE: GS), JP Morgan (NYSE: JPM) and Barclays (NYSE: BCS). (FT)

China begins to cancel or delay some commodities imports — another sign its economy has slowed. (FT)

UK Prime Minister David Cameron says the EU should prepare for the departure of Greece. (FT)

Douglas A. McIntyre