Shares sink toward one year low as bears bite again   Crude Oil WTI $68.33 Resin Prices ABS: £2.28/kg, PMMA:£2.95/kg,  PC:£3.32/kg, POM:£1.87/kg, PS GPPS £1.54/kg PP homo:£1.32/kg, PP random:£1.43/kg, PS HIPS:£1.66/kg, SAN transparent:£2.16/kg.