UK stocks suffered steep declines on Tuesday as volatility in sovereign debt markets and ongoing fears about Greece sent shares 1.4% lower, with Easyjet leading the fallers on a cautious outlook.The FTSE 100 finished the session down 96.05 points, or 1.37%, at 6,933.80, though the index did finish firmly above its intraday low of 6,887.52 reached early on.The late rally, albeit small, came as Wall Street stocks trimmed heavy losses - the Dow was down just 44 points after an earlier drop of nearly 200 points - on the back of a rebound in US Treasuries.Yields on 10-year US Treasuries had surged to a six-month high of 2.36%, but immediately dropped to trade three basis points lower at 2.25% by the close in London.Government bonds elsewhere, however, were sold off with borrowing costs rising sharply in Germany, the UK, France, Italy and Spain.Greek 10-year bond yields, meanwhile, rose 13 basis points to 10.69% amid reports that the International Monetary Fund does not want to participate in a third bailout for the country.The news came just a day after Greek finance minister Yanis Varoufakis admitted that Athens' liquidity problem is a "terribly urgent issue", saying that the country could run out of cash in "the next couple of weeks".If that wasn't enough, concerns about a UK referendum on EU membership were also weighing on stocks after David Cameron suggested that the vote could be brought forward to 2016 from the expected 2017.Easyjet sinks, miners buck the trendBudget airline Easyjet met guidance after swinging to a small profit in the first half, though it faces tougher conditions in the latter part of the year. The company saw shares sink after saying that exchange-rate movements and air traffic control strikes in France are expected to hit second-half results.Mining stocks held up well despite declines on the wider market as a weaker US dollar lifted metal prices across the board. Fresnillo, Antofagasta, Randgold Resources, Anglo American and BHP Billiton.Credit-checking outfit Experian jumped after returning to organic revenue growth in the fourth quarter. For the full year, total revenue from continuing activities grew 1% to $4.81bn, with profit before tax slightly above flat at $751m.Pubs group Enterprise Inns impressed the market with plans to increase direct management of pubs and grow its commercial property business, as it unveiled first-half results that met targets.Lloyds Banking Group rose after the government sold £500m-worth of shares in the lender, taking its holding to below 20%. Analyst Michael Hewson from CMC Markets said the share sale reduces the government's influence on how the bank manages its day-to-day operations. Market MoverstechMARK 3,222.47 -1.33%FTSE 100 6,933.80 -1.37%FTSE 250 17,689.23 -1.02%FTSE 100 - RisersExperian (EXPN) 1,214.00p +3.14%Fresnillo (FRES) 713.50p +1.71%Antofagasta (ANTO) 791.50p +1.15%Randgold Resources Ltd. (RRS) 4,741.00p +0.85%Lloyds Banking Group (LLOY) 87.02p +0.48%Sports Direct International (SPD) 656.00p +0.38%Anglo American (AAL) 1,132.00p +0.35%Capita (CPI) 1,250.00p +0.32%British Land Company (BLND) 846.50p +0.24%BHP Billiton (BLT) 1,575.00p +0.19%FTSE 100 - FallerseasyJet (EZJ) 1,654.00p -9.77%Kingfisher (KGF) 357.50p -3.53%Aberdeen Asset Management (ADN) 434.50p -3.44%Ashtead Group (AHT) 1,139.00p -3.23%Hargreaves Lansdown (HL.) 1,198.00p -3.00%Royal Mail (RMG) 483.50p -2.83%AstraZeneca (AZN) 4,400.00p -2.83%Sage Group (SGE) 541.00p -2.70%Old Mutual (OML) 226.60p -2.62%SABMiller (SAB) 3,502.50p -2.61%FTSE 250 - RisersGreene King (GNK) 830.00p +3.17%Tullow Oil (TLW) 419.60p +3.15%Synthomer (SYNT) 335.50p +3.07%Spirit Pub Company (SPRT) 115.00p +2.95%Hunting (HTG) 592.00p +2.78%Brown (N.) Group (BWNG) 346.30p +2.73%Enterprise Inns (ETI) 136.00p +2.72%Thomas Cook Group (TCG) 156.10p +2.03%Petra Diamonds Ltd.(DI) (PDL) 169.50p +1.80%PayPoint (PAY) 876.50p +1.51%FTSE 250 - FallersTed Baker (TED) 2,728.00p -7.46%Regus (RGU) 245.00p -6.77%Indivior (INDV) 225.30p -6.05%AL Noor Hospitals Group (ANH) 819.00p -5.70%COLT Group SA (COLT) 150.20p -5.00%Jardine Lloyd Thompson Group (JLT) 1,042.00p -3.87%Euromoney Institutional Investor (ERM) 1,211.00p -3.51%Marston's (MARS) 163.00p -3.49%Greggs (GRG) 1,142.00p -3.47%Man Group (EMG) 176.30p -3.45%