['DATE | 2018', 'DATE | quarterly', 'DATE | the_end_of_June', 'DATE | the_end_of_September', 'DATE | the_month', 'ORDINAL | 52', 'PERCENT | 16.8%', 'PERCENT | 54.9%', 'stockChange | declined', 'stockChange | lost']
The index, which had 52 qualifying members during the month following the quarterly rebalancing at the end of June, declined 54.9% in 2018 and has now lost 16.8% as of the end of September: