BAE Systems has fallen after warning that sales in 2011 will decline as cutbacks in government spending start to bite. The defence company saw sales edge up by 1.8% in 2010 to £22.4bn, while underlying earnings per share climbed to 40.8p, versus market expectations of 41.85p.Asterand's bid/offer spread has narrowed and that is why the share price has fallen back to day. Yesterday, the human tissue supplier's bid offer spread widened from 16p/19p to 16p/28p at one point. Today the bid/offer spread is back to 16p/19p FTSE TechMARK - Risers Antisoma (ASM) 2.50p +5.93%KCOM Group (KCOM) 64.25p +4.05%Dialight (DIA) 613.50p +3.98%Cable & Wireless Worldwide (CW.) 75.95p +3.26%Logica (LOG) 147.40p +3.15%Vectura Group (VEC) 78.00p +2.63%Pace (PIC) 232.80p +2.46%Psion (PON) 93.00p +2.20%Autonomy Corporation (AU.) 1,668.00p +2.08%Oxford Instruments (OXIG) 620.00p +0.81%FTSE TechMARK - Fallers Asterand (ATD) 17.50p -20.45%BAE Systems (BA.) 339.60p -4.53%Electronic Data Processing (EDP) 51.50p -4.63%Microgen (MCGN) 132.00p -2.94%Renovo Group (RNVO) 15.50p -1.59%Phytopharm (PYM) 8.50p -1.45%Kofax (KFX) 481.00p -1.23%Smiths Group (SMIN) 1,369.00p -1.23%Promethean World (PRW) 61.75p -1.20%Phoenix IT Group (PNX) 247.25p -1.10%