We would like to inform you for the disposal of new version of "Risk Management Parameters" that will come in effect on Tuesday, 13 January 2009.

Changes concerning:

• Change of fixed volatility parameter that RIVA uses for the margin calculation for the derivative products on the indices FTSE/ASE-20 and FTSE/ASE Mid-40 is being adjusted from 40% to 46%.

• Percentage change of ask volatility, for short position closing on options, that is been used for the calculation of member risk from 50% to 56%.