The Nasdaq-100 is reconstituted each year in December, timed to coincide with the quadruple witch expiration Friday of the quarter.
— Read on www.financialexpress.com/investing-abroad/featured-stories/nasdaq-100-adds-six-companies-to-stock-market-index-trading-to-begin-from-this-date/2917328/
Finding Value in ETF's Worth Owning for the Long Haul