** COSOL COS.AX slides 23.5% to A$0.455; set for biggest intraday percent decline ever

** Asset management solutions provider sees H1 revenue in the range A$7 mln-A$8 mln ($4.6 mln-5.2 mln) lower than PCP

** Says muted coal sector activity impacting business base, with drop in demand for advisory consulting, provision of professional services from major miners, among others

** YTD, COS falls 56.3%

($1 = A$1.5389)

(Reporting by Keshav Singh Chundawat in Bengaluru)

((Keshav.singhchundawat@thomsonreuters.com))