(a) (i) Trading suspension or absence of closing price on the 1st, 2nd, 3rd, or 4th valuation date only - in that case, the closing price on the next valuation date will be used as the closing price on such 1st, 2nd, 3rd, or 4th valuation date, so that there are 5 closing prices used to determine such 5-day average closing price.
(ii) Trading suspension or absence of closing price on each of the 3rd and 4th valuation dates only - in that case, the closing price on the 5th valuation date will be used as the closing price on each of the 3rd and 4th valuation dates, so that there are 5 closing prices used to determine such 5-day average closing price.
(b) Trading suspension or absence of closing price on the 5th valuation date only (but not the expiry date) - in that case, the closing price on the 5th valuation date is determined based on the issuer’s good faith estimate made in accordance with the terms and conditions. Such determination will be made on a case-by-case basis based on prevailing market conditions. The closing price on the expiry date was used in most of the past cases.
(c) Trading suspension or absence of closing price on each of the 5 valuation dates and the expiry date - in that case, the closing prices on each of the 5 valuation dates are determined based on the issuer’s good faith estimate made in accordance with the terms and conditions. Such determination will be made on a case-by-case basis by reference to the prevailing market conditions. The last reported closing price was used in most of the past cases.
Trading suspension above means suspension of trading of the underlying stock during the last half hour before close of trading.
You may read further "How is the settlement price at expiry of a warrant calculated?"
