Day after day there are stories on the news about people who kill themselves because they worked so much overtime; it's making the business world nervous.
Companies are on edge because of all the news stories about overworked people committing suicide.
残業 = overtime (「overwork」は「過労」です！）
連日 = day after day, every day
神経質 = nervous, on edge, sensitive
overworked = 過重労働の, 過労の
アメリカ合衆国 
