Possible witnesses who could be called to testify include Lloyd C. Blankfein, Goldman’s chief executive, and A.G. Lafley, the former chief executive of Procter & Gamble.

Stocks traded lower, as unease about Europe overshadowed a hopeful unemployment report in the United States.

The lofty valuation for Spotify, a service that expanded into the United States only last year, underscores the rapid growth of the online music start-up, which is built on top of Facebook’s social network.

Pinterest, which allows users to share photographs, recipes and other media on custom “pinboards,” raised $100 million in a funding round led by the Japanese e-commerce company Rakuten.

Hedge funds and other investors taking advantage of JPMorgan Chase’s distress have fueled faster deterioration in the underlying credit market positions held by the bank.

Media General said that it sold nearly all of its newspaper properties to Berkshire Hathaway for $142 million.

The first phase of the cost-cutting plan is intended to save the agency nearly $1.2 billion a year amid declining mail volume.

Human Genome Sciences has adopted a shareholder rights plan to fend off a $2.59 billion takeover offer from the British drug maker GlaxoSmithKline.

New capital requirements are being implemented as the authorities press firms to hold more cash in reserve to protect against future financial shocks.

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