1. The equity index referred to in Article 106(2) of Directive 2009/138/EC shall comply with all of the following requirements:

(a) the equity index measures the market price of a diversified portfolio of equities which is representative of the nature of equities typically held by insurance and reinsurance undertakings;

(b) the level of the equity index is publicly available;

(c) the frequency of published levels of the equity index is sufficient to enable the current level of the index and its average value over the last 36 months to be determined.

2. Subject to paragraph 4, the symmetric adjustment shall be equal to the following:

where:

(a) CI denotes the current level of the equity index;

(b) AI denotes the weighted average of the daily levels of the equity index over the last 36 months.

3. For the purposes of calculating the weighted average of the daily levels of the equity index, the weights for all daily levels shall be equal. The days during the last 36 months in respect of which the index was not determined shall not be included in the average.

4. The symmetric adjustment shall not be lower than - 10 % or higher than 10 %.