Investors of the UK's biggest high street banks were left underwhelmed on Monday by the news that Britain's lenders had all passed the latest stress tests in Europe.Lloyds, HSBC, RBS and Barclays were all trading firmly in the red in afternoon trade.Results from the European Banking Authority's (EBA) health checks of European banks showed that 24 of 130 had failed. The EBA looked at how lenders' balance sheets would cope with tougher macro conditions, such as rising unemployment, a slowdown in economic growth and falling house prices, as it called for a common-equity tier-one (CET1) capital ratio of 5.5%.While all the UK banks exceeded the target, Lloyds only narrowly beat the threshold with a CET1 of 6.2%. HSBC's CET1 came in at 9.3%, followed by Barclays at 7.1% and RBS at 6.7%.Analysts at Jefferies said that Lloyds "fare[d] worse than expected" and is now "at risk" ahead of the Prudential Regulation Authority's (PRA) forthcoming stress tests, the results of which are due on 16 December.The PRA's review will encompass the EBA test in addition to UK-specific macro scenarios, including a more severe drop in house prices. Jefferies said: "None of this bodes particularly well for Lloyds given that it is UK mortgage centric (60% of first-half customer loans are in secured retail)."Lloyds was also making headlines after Sky News said that the bank is set to announce the closure of more than 200 branches, as well as 9,000 job cuts.Top performing sectors so far todayPersonal Goods 22,820.62 +0.48%Insurance (non-life) 1,863.53 +0.35%Food Producers & Processors 7,231.53 +0.31%Tobacco 38,549.29 +0.26%Household Goods & Home Construction 11,666.12 +0.20%Bottom performing sectors so far todayIndustrial Metals & Mining 1,331.98 -2.80%Automobiles & Parts 7,014.20 -2.47%General Industrials 3,674.30 -1.87%Banks 4,373.67 -1.85%Mining 14,881.22 -1.82%