Financial software specialist Gresham Computing dropped after first-half pre-tax losses widened to ÂŁ1m compared with ÂŁ435,000 last time.The group also announced the disposal of its HP NonStop software and support business Gresham Software Labs.'The deal allows us to further focus our attention on core and strategic business,' said chief executive Andrew Walton-Green.FTSE TechMARK - FallersParity Group (PTY) 21.25p -11.46%Gresham Computing (GHT) 39.50p -7.06%Ark Therapeutics (AKT) 43.50p -6.45%Axis-Shield (ASD) 355.00p -3.47%Filtronic (FTC) 35.00p -2.78%Innovation Group (TIG) 10.50p -2.33%NXT (NTX) 11.00p -2.22%Oxford Biomedica (OXB) 11.50p -2.13%Vislink (VLK) 27.75p -1.77%Alphameric (ALM) 32.00p -1.54%FTSE TechMARK - RisersPuricore (PURI) 16.75p +13.56%Emblaze (BLZ) 39.25p +7.53%E2V Technologies (E2V) 60.00p +7.14%Ricardo Group (RCDO) 259.00p +3.60%Consort Medical (CSRT) 377.00p +3.01%NCC Group (NCC) 375.00p +2.74%Morse (MOR) 29.50p +2.61%Imagination Technologies (IMG) 166.25p +2.31%Oxford Instruments (OXIG) 175.00p +1.45%Optos (OPTS) 74.00p +1.37%