For the purposes of Article 4(1)(b), the own funds requirement for vega risk shall be calculated by a process consisting of the following sequence of steps:
(a)
for each individual option the value of vega shall be determined;
(b)
for each individual option an assumed plus/minus 25 % shift in the implied volatility shall be calculated, where implied volatility shall be understood in the manner described in Article 4(2);
(c)
(d)
for each distinct underlying type, understood in the manner described in Article 5(3), the values resulting from the step in point (c) shall be summed up;
(e)
the sum of absolute values resulting from the step in point (d) shall provide the total own funds requirement for vega risk.