USA500 Short. The nervousness surrounding Fed meetings reinforces the volatility of major stock indices. Investors expect the Federal Reserve System’s not-so-conciliatory tone this week in response to caution over rising borrowing costs caused by massive fiscal stimulus. On Friday, major stock indices recorded their best week in the last six, as the approval of a $ 1.9 trillion aid bill and mass vaccinations accelerated demand for economy-related stocks such as banks, energy and materials. However, it can be seen that investors are not in the mood to take risks because they are considering the possibility of higher inflation, regardless of what the central banks say.