ismagilov/Getty, Yellow duck/Getty, Tyler Le/BIInvestors need to be wary as sticky inflation remains a risk, Deutsche Bank says.The firm detailed five reasons why consumer prices could stay persistently elevated.Commodity prices, Fed rate cuts, and accelerating money supply growth all play a role.It's tempting to think the Federal Reserve's fight against inflation is over, given the central bank's recent rate cuts and sharpened focus on the labor market.