Stocks were flashing this warning signal before tariff jitters drove Dow down 500 points - MarketWatch
1. Investors are reacting negatively to Trump's tariff announcement. 2. S&P 500 consistently above Bollinger Band indicates potential profit-taking. 3. Historical patterns suggest possible market declines after similar signals. 4. Trump's tariffs may impact investor confidence and lead to recession fears. 5. Small-cap stocks may benefit from current market momentum.