If Nvidia stumbles, how far will the stock market fall? MarketWatchNvidia Is No Cisco, but It Is Getting Expensive The Wall Street JournalNvidia’s shares are on fire. The broader market looks less rosy CNNWhy Nvidia’s ‘gravy train’ could come to ‘screeching halt’ after a volatile trading week Yahoo FinanceNvidia’s staggering gains leave investors wondering whether to cash in or buy more Reuters