Investors are betting against PartyGaming after the founder of the online gambling group started selling some of his stake. He will sell up to 75m shares in the firm, reports say.Investors have no appetite for shares in Greggs even after the bakery chain served up a 2.5% rise in third quarter sales and said it is on track to deliver full results in line with company expectations.Hargreaves Lansdown is also lower after a bullish update. Assets managed by the private client stockbroker and fund manager jumped by more than 20% in the past three months as rising stock markets 'galvanized investors into action'.On the plus side, car dealer Inchcape is higher after saying full year results are expected to be significantly ahead of previous expectations. It also cautioned that conditions are expected to remain challenging well into the second half of 2010.FTSE 250 - RisersImagination Technologies (IMG) 247.00p +6.51%International Personal Finance (IPF) 231.50p +5.47%Inchcape (INCH) 34.55p +5.11%Robert Wiseman (RWD) 465.00p +4.49%BlueBay Asset Management (BBAY) 372.70p +3.33%Avis Europe (AVE) 30.99p +1.94%ARM Holdings (ARM) 160.40p +1.71%Brown (N.) Group (BWNG) 264.40p +1.69%Thames River Multi Hedge PCC Ltd. Realisation Shares (TRMA) 122.00p +1.58%BSS Group (BTSM) 278.20p +1.46%FTSE 250 - FallersPartyGaming (PRTY) 247.40p -13.04%Greggs (GRG) 437.40p -6.00%Stobart Group (STOB) 123.80p -3.58%PayPoint (PAY) 457.50p -3.17%Hochschild Mining (HOC) 308.70p -3.08%Ecofin Water & Power Opportunities (ECWO) 151.20p -3.08%Heritage Oil (HOIL) 510.00p -2.86%Travis Perkins (TPK) 858.50p -2.44%Euromoney Institutional Investor (ERM) 373.70p -2.43%Hargreaves Lansdown (HL.) 290.00p -2.36%