On Wednesday, the Invesco QQQ Trust (NASDAQ: QQQ) was down 0.5%, SPDR Dow Jones Industrial Average ETF (NYSEArca: DIA) was up 0.4%, and iShares Core S&P 500 ETF (NYSEArca: IVV) was flat. U.S. markets and stock exchange traded funds were mixed Wednesday with the technology-heavy Nasdaq falling behind on concerns over an overheating economy and potential policy changes that could rein in growth. Loose monetary policy coupled with President Joe Biden’s proposed $1.9 trillion package for pandemic relief have caused some to warn of a coming surge in inflation.