Stock market mania in the U.S. is similar to the top in January 2018 By: MarketWatch January 21, 2020 at 10:48 AM EST Poor earnings or an exogenous event could easily cap further gains. Read More >> Related Stocks: Adv Micro Devices Alphabet-A Alphabet-C Amazon.com Apple Dow Industrials SPDR Facebook Micron Technology Microsoft NVIDIA Corp Nasdaq ETF S&P Depository Receipts