(1) In calculating the value of positions for the purposes of Rule 2.2.1(c) an Authorised Person must value:
(a) equities and debt instruments at their market prices;
(b) Derivatives according to the values of the underlying; and
(c) Underwriting positions according to the market value of the underlying Securities.
(2) An Authorised Person must sum all long and short positions (ignoring the sign) to calculate its total Trading Book size.