Major activity on today’s market included big moves in LinkedIn corp (NYSE:LNKD), JPMorgan Chase & Co. (NYSE:JPM), T-Mobile USA (NYSE:PCS),  Arena Pharmaceuticals, Inc (NASDAQ:ARNA), and Royal Bank of Scotland plc (NYSE:RBS). Here’s how they moved and what pushed them today.

Stock market news

LinkedIn Corp (NYSE:LNKD) stock fell by 12.93 percnet in normal trading today, closing today’s trading at $175.59 per share. The company suffered a backlash after it gained huge value heading into the revelation of its earnings report for the first three months of 2013. The earnings report was not well loved by investors, and they showed their dissatisfaction with the company’s performance on the market today.

The firm, along with Yelp Inc (NYSE:YELP) was part of a huge wave of investment into social media businesses in the first quarter of the year. Shares in Yelp Inc (NYSE:YELP) appear to have fallen more than 3 percent after the market judged them guilty by association. LinkedIn Corp (NYSE:LNKD) was a victim of its own success.

The firm’s incredible earnings report for the fourth quarter of the new year, along with an incredible rally in the stock market in the opening months of the year and a relatively positive Q1 earnings season, drove speculation that it was almost impossible for it to meet. Stock in the firm is still up more than 50 percent since the year began.

JPMorgan Chase & Co. (NYSE:JPM) fell a fraction more than 1 percent on today’s market under heavy trading volume. Around 43 million shares were traded in JPMorgan Chase & Co. (NYSE:JPM) on today’s market, compared to a volume average of around 22 million.

The reason for the high volume in trading on the firm’s shares isn’t readily clear, but there was high volume in general on the market earlier this morning after the most recent jobs numbers came in way above expectations. JPMorgan Chase & Co. (NYSE:JPM) suffered in the estimation of investors after the possibility of regulatory actions against the bank multiplied.

The New York Times ran an article this morning sourcing a document that suggested the company was losing favor in Washington. JPMorgan Chase & Co. (NYSE:JPM) investors were spooked and traded massive numbers to edge away from the investment bank.

T-Mobile Us Inc (NYSE:PCS) only started trading earlier yesterday, and for a company still finding its feet in the public markets, it’s doing incredibly well. On today’s market the firm’s stock increased by more than 47 percent.

T-Mobile Us Inc (NYSE:PCS) began trading on May 2 after the successful merger between T-Mobile, which is owned by German company Deutsche Telekom, and Metro PCS. T-Mobile Us Inc (NYSE:PCS) took the latter firm’s ticker and the firm has gained strongly on the addition of assets to the stocks worth.

Arena Pharmaceuticals, Inc (NASDAQ:ARNA) lost just over 9.5 percent of its value on today’s market, after the company released a less than stellar first quarter earnings, and its announcement that it would no longer seek to market the drug Belviq in the European Union.

Arena Pharmaceuticals Inc (NASDAQ:ARNA) is involved in the design, manufacture and sale of pharmaceuticals, most famously a product that seeks to fight obesity related problems. Analysts had expected earnings of 20 cents per share form the company for the first three months of 2013, but the company’s CFO couldn’t make that add up.

Arena Pharmaceuticals Inc (NASDAQ:ARNA) revealed that it had earned just 9 cents per share in the first three months of 2013, as it had failed to receive certain payments and their new drug Belviq is having problems on both sides of the Atlantic. Shares closed at $7.63.

Royal Bank of Scotland plc (NYSE:RBS) shares fell by 5.64 percent on today’s market, leaving the company’s shares at $9.03 on market close. The bank is owned, in majority, by the government of the United Kingdom after it failed to handle the financial crisis in any meaningful way.

Rumors were flying around that the bank might be sold soon, after its stock recovers to a level where the UK government might see a return. The bank indicated in its first quarter report, after it reported a less than expected loss, that the government could begin selling its share of the company.

Those rumors proved destructive to the health of the bank’s stock however, as it became clear that political pressure would come to bear on the Royal Bank of Scotland plc (NYSE:RBS) if the United Kingdom government decides to go ahead with a sale. The Mayor of London, Boris Johnson, said that he would like to see the bank broken up on sale, worrying investors.