Cost Inflation Index updated for capital gains taxation; notified index applies from the new financial year onward. Cost Inflation Index governs indexation for capital gains taxation; a new CII series applies from the post-2016-17 financial year with the latest notified index published in the cited notification. The document provides a ready reckoner listing historical annual CII values from the base year through the last year of the historical series to assist calculation of indexed cost of acquisition and improvement for income tax purposes.