This indicator flashed warnings in 2000 and 2007 — and it’s buzzing now By: MarketWatch December 30, 2021 at 06:55 AM EST They don't ring a bell at the top, the expression goes, but here's an indicator that topped in 2000 and 2007. Read More >> Related Stocks: AMC Entertainment Holdings, Inc. Class A Common Stock Apple Biogen Idec Cenntro Electric Group Limited - Ordinary Shares Credit Suisse Group American Depositary Shares Didi Global Inc ADR GameStop Corp Johnson & Johnson NIO Inc. American depositary shares Tesla, Inc.