Some highlights of the day's business news:
Stocks dragged down by oil and Alcoa
U.S. stocks finished lower Tuesday, with all three major indexes losing about 1%, as a 3% drop in oil prices sparked a sell-off in energy stocks and Alcoa's sales disappointment weighed down the Dow.
Investors also were on edge after Japanese officials raised the threat level at the Fukushima nuclear plant to the same as the 1986 incident at Chernobyl, in what was then the Soviet Union.
"Some people wanted to forget the nuclear threat in Japan, but it popped back up and worsened overnight," said Joe Saluzzi, co-head of equity trading at Themis Trading. "There are a lot of headwinds in the market, and on a day like today, investors are waking up and taking notice of all of them."
The Dow Jones industrial average dropped 118 points, or 1%, dragged down by a 6% drop in Alcoa's stock. The aluminum giant reported disappointing sales late Monday as it kicked off the first-quarter earnings season.
Ceglia says Facebook e-mails show he owns 50%
Paul Ceglia, a New York resident who sued Mark Zuckerberg last year for 50% ownership of Facebook, has re-filed his complaint with e-mails that he says prove his case.
The amended complaint, filed Monday in New York district court, alleges that Ceglia and Zuckerberg signed a contract in April 2003 that gives Ceglia half ownership of what is now Facebook.
The "work for hire" contract that Ceglia filed as evidence says he paid Zuckerberg $1,000 for development work on a site called StreetFax, and $1,000 for work on the site "the Face Book," which Zuckerberg had already started.
The alleged contract also says that Ceglia would own 50% of the "software, programming language and business interests" of Facebook. That contract was included in Ceglia's suit from 2010. Ceglia re-filed the suit on Monday with high-profile law firm DLA Piper, and he included several alleged e-mails between him and Zuckerberg from July 2003 to July 2004. The amended complaint was first reported by Business Insider.
– CNNMoney.com reporters Hibah Yousuf and Julianne Pepitone contributed to this report.