Trading updates provided much of the impetus for the FTSE 250 index, up 0.5% today, led by a stunning performance by Enterprise Inns.Pubs group Enterprise Inns is leading a pub sector rally on a statement that Christmas business was strong, with a deterioration in business beginning to slowThe sale of underperforming pubs has helped cool the decline in average net income per pub to around 4% for the 16 weeks to 16 January from 8% during the last financial year.EasyJet is another big riser after it increased total revenue per seat by a bigger than expected 4.2% in its first quarter as 11m people flew with the budget airline. Higher revenue will cancel any losses suffered during Britain's big freeze, it added.Commerzbank said the 10.5% jump in sales to £607.5m was in line with estimates, underlying yields were a touch better, with operating costs stable. The broker keeps its 'buy' rating and says the filling of the vacant management positions may be a further positive trigger.There were also gains for Petropavlovsk, formerly Peter Hambro Mining, which gained after the Russia-focused miner said it will resume dividend payments after hitting its production targets for the year.FTSE 250 - RisersEnterprise Inns (ETI) 117.70p +24.03%Punch Taverns (PUB) 81.95p +10.07%easyJet (EZJ) 385.30p +5.56%Rightmove (RMV) 548.50p +4.48%Petropavlovsk (POG) 1,069.00p +4.09%Rotork (ROR) 1,307.00p +3.73%Melrose Resources (MRS) 333.00p +3.13%Marston's (MARS) 85.90p +2.69%Provident Financial (PFG) 978.50p +2.46%Morgan Crucible (MGCR) 165.90p +2.41%FTSE 250 - FallersInternational Personal Finance (IPF) 218.90p -3.99%Ferrexpo (FXPO) 214.00p -3.73%Filtrona PLC (FLTR) 185.50p -3.23%Inchcape (INCH) 27.74p -3.01%BlueBay Asset Management (BBAY) 355.60p -2.71%Sports Direct International (SPD) 96.70p -2.18%Moneysupermarket.com (MONY) 72.40p -2.16%Kier Group (KIE) 1,016.00p -2.12%Kesa Electricals (KESA) 136.70p -1.94%Barratt Developments (BDEV) 129.40p -1.82%