Among exchange-traded funds, the Nasdaq 100 tracker Invesco QQQ Trust (NASDAQ: QQQ) is down by 1.25% on Thursday, while the SPDR S&P 500 ETF (NYSEARCA: SPY) is also ticking lower by 0.69%. Today, the U.S. Treasury yields climbed after key inflation data showing that prices across a wide range of goods and services had soared in January. The CPI would also be a key metric for markets since inflation is normally seen as a direct trigger for the Fed’s first pandemic-era interest rate hike.