UK stocks plunged into the red on Tuesday morning on concerns about Greece and bond-market volatility, while blue chip budget airline Easyjet disappointed investors with its full-year outlook.The FTSE 100 was trading 1.04% lower at 6,956.41 early on ahead of data which is forecast to show that UK industrial production growth slowed to a standstill in March.Industrial production failed to grow month-on-month in March after a 0.1% increase in February, according to analysts' forecasts ahead of data due at 09:30.Athens met the latest deadline to repay the International Monetary Fund €750m, though that didn't stop Greek bond yields from surging on Monday. Greek 10-year bond yields were down two basis points on Tuesday after rising to 10.96% the previous session.As the Eurogroup met on Monday to discuss a cash-for-reform deal for Greece, finance minister Yanis Varoufakis warned that the Mediterranean nation is just two weeks away from running out of money. "The liquidity issue is a terribly urgent issue," Varoufakis told reporters in Brussels.A sell-off in bond markets elsewhere on Monday was also concerning investors as yields jumped on changing inflation expectations. "Large amounts of Eurozone debt was yielding negative returns after the region fell into deflation territory and this had to reverse once we saw a rebound in oil prices," said Oanda analyst Craig Erlam.Meanwhile, concerns about a UK referendum on EU membership were also dampening sentiment on the market after David Cameron suggested that the vote could be brought forward to 2016 from the expected 2017.Easyjet disappoints with outlookBudget 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.Credit-checking outfit Experian also fell despite 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.Insurer Hiscox declined after underwhelming with gross premiums growth of 12% to £561.7m in the first quarter.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.Market MoverstechMARK 3,224.73 -1.26%FTSE 100 6,956.41 -1.04%FTSE 250 17,696.48 -0.97%FTSE 100 - RisersFresnillo (FRES) 709.50p +1.14%BHP Billiton (BLT) 1,588.00p +1.02%Randgold Resources Ltd. (RRS) 4,749.00p +1.02%Pearson (PSON) 1,327.00p +0.68%Anglo American (AAL) 1,134.00p +0.53%Antofagasta (ANTO) 785.50p +0.38%Sainsbury (J) (SBRY) 282.00p +0.18%Morrison (Wm) Supermarkets (MRW) 183.20p +0.16%FTSE 100 - FallerseasyJet (EZJ) 1,690.00p -7.80%Hargreaves Lansdown (HL.) 1,199.00p -2.92%SABMiller (SAB) 3,513.00p -2.32%United Utilities Group (UU.) 977.50p -2.20%Shire Plc (SHP) 5,135.00p -2.10%InterContinental Hotels Group (IHG) 2,725.00p -2.08%St James's Place (STJ) 921.00p -2.07%Prudential (PRU) 1,616.00p -1.91%National Grid (NG.) 888.40p -1.89%Aviva (AV.) 531.00p -1.85%FTSE 250 - RisersPolymetal International (POLY) 567.50p +1.61%Thomas Cook Group (TCG) 155.30p +1.50%Inchcape (INCH) 856.50p +1.06%Amec Foster Wheeler (AMFW) 878.50p +1.04%Spirit Pub Company (SPRT) 112.60p +0.81%Greene King (GNK) 810.00p +0.68%Enterprise Inns (ETI) 133.20p +0.60%Acacia Mining (ACA) 288.20p +0.59%Just Eat (JE.) 443.80p +0.45%Vedanta Resources (VED) 677.50p +0.37%FTSE 250 - FallersRegus (RGU) 245.30p -6.66%Diploma (DPLM) 761.00p -3.91%Halfords Group (HFD) 448.80p -2.84%Man Group (EMG) 177.50p -2.79%Spirax-Sarco Engineering (SPX) 3,245.00p -2.52%AL Noor Hospitals Group (ANH) 847.00p -2.48%Allied Minds (ALM) 616.50p -2.38%NMC Health (NMC) 841.00p -2.21%Provident Financial (PFG) 3,053.00p -2.18%St. Modwen Properties (SMP) 427.50p -2.17%