One purchase late in the morning appears to be behind the rise in IT services and staff provider Parity. A buyer paid 28p a share for 17,723 shares at 11.23am. That is equivalent to an investment of around £5,000. There has been one trade each day so far this week. Human tissue services provider Asterand continues to rise on the back of its partnership deal with life sciences firm 5AM Solutions.Financial services software provider Fidessa is lower after Panmure Gordon said that the shares looked 'toppy'. The broker retains its hold recommendation and expects a positive trading statement on 28 April. Panmure Gordon is still a great fan of Fidessa. FTSE TechMARK - RisersParity Group (PTY) 27.75p +6.73%Asterand (ATD) 15.50p +4.20%Antisoma (ASM) 2.50p +3.52%E2V Technologies (E2V) 112.00p +3.23%Innovation Group (TIG) 16.75p +2.29%KCOM Group (KCOM) 59.75p +2.14%Oxford Biomedica (OXB) 5.75p +1.77%Phytopharm (PYM) 7.50p +1.69%Ricardo (RCDO) 344.00p +1.18%Corin Group (CRG) 56.50p +0.89%FTSE TechMARK - FallersCryptologic Ltd. (CRP) 120.00p -20.00%Torotrak (TRK) 38.00p -11.63%Alterian (ALN) 175.00p -3.05%Fidessa Group (FDSA) 1,769.00p -2.27%Phoenix IT Group (PNX) 199.75p -1.60%Sinclair Pharma (SPH) 35.00p -1.41%Anite (AIE) 63.00p -1.37%RM (RM.) 152.25p -0.98%Renovo Group (RNVO) 14.50p -0.85%Xaar (XAR) 234.00p -0.85%