Group 1: Market Reaction - European markets reacted negatively to President Trump's new global tariff policy, with the pan-European Stoxx 600 index down by 0.3% at the start of the week [2][12] - Following the announcement of a new unified global tariff of 15%, replacing the previous 10% rate, European stock indices experienced a decline [4][14] Group 2: Individual Stock Performance - JD Sports, a UK sports retailer, saw its stock price rise nearly 4% after announcing a share buyback plan to return approximately £200 million ($270 million) to investors [7][18] - Rolls-Royce, a UK aerospace and defense giant, experienced a 0.6% drop in stock price ahead of its annual financial report, despite plans for a £1.5 billion share buyback [7][18] - Johnson Matthey, a specialty chemicals producer, faced a significant stock price drop of 12% after agreeing to lower the sale price of its catalyst technology business to £1.3 billion [8][18] Group 3: Economic Data and Market Outlook - Upcoming economic data includes the German IFO business climate index and the latest inflation figures from Italy, which may impact market sentiment [9][16] - U.S. stock index futures declined due to uncertainties surrounding the new tariff policy and its potential effects on inflation and global growth [9][16]