Mid-caps fared better than the blue chips on Tuesday, as losses from the industrial metals, telecommunications and oil sectors were offset by strong performances from pharmaceutical, property and utility stocks.As of 15:00 BST, the FTSE 250 was trading flat at 17,726.National Express gained, after being named as the preferred bidder for two more German rail franchises. The company said the new contracts were expected to generate revenues of around €1bn before their expiration in December 2033.NMC Health extended Monday's gains, which came as it acquired long-term medical care provider ProVita for $160.6m. The acquisition is set to be completed by the third quarter of this year.Ladbrokes was trading higher as Morgan Stanley upgraded the stock to 'overweight' from 'equalweight' and raised the price target to 150p from 135p. "We see scope for forecast upgrades for the first time in years, both Digital and Retail have significant catch-up potential, Europe could be a hidden gem, cash earnings exceed earnings per share, and the valuation is cheap," the broker said.Crest Nicholson Holdings dipped as upbeat first-half results were overshadowed by a downgrade from Goldman Sachs to 'neutral' from 'buy'.Thomas Cook continued to decline, after setting up a joint venture with shareholder Fosun in the Chinese travel market on Monday, and announcing that Carl Symon would step down from his role as non-executive director on 30 September. RisersLadbrokes (LAD) 121.70p +4.02%Man Group (EMG) 165.10p +2.55%Big Yellow Group (BYG) 669.00p +2.37%Euromoney Institutional Investor (ERM) 1,173.00p +2.00%National Express Group (NEX) 313.80p +1.78%Ted Baker (TED) 2,890.00p +1.51%RPS Group (RPS) 229.90p +1.50%WH Smith (SMWH) 1,520.00p +1.47%Pets at Home Group (PETS) 277.70p +1.46%Atkins (WS) (ATK) 1,527.00p +1.46%FallersKaz Minerals (KAZ) 232.50p -4.71%Allied Minds (ALM) 540.00p -3.83%Ophir Energy (OPHR) 118.60p -2.71%Wood Group (John) (WG.) 669.00p -2.62%Fidelity China Special Situations (FCSS) 164.30p -2.49%Centamin (DI) (CEY) 62.50p -2.19%Petrofac Ltd. (PFC) 882.00p -2.05%Drax Group (DRX) 365.40p -2.01%BlackRock World Mining Trust (BRWM) 289.70p -1.86%Tullow Oil (TLW) 363.10p -1.71%