Investors should watch whether Kevin Warsh, chair of the Federal Reserve, signals possible adoption of a new inflation gauge during a Jackson Hole speech at 11 p.m. on Aug. 28, Commerzbank said. Analyst Volkmar Baur said Warsh has repeatedly described the Fed’s 2% inflation target as non-negotiable but has not explicitly referred to the personal consumption expenditures price index, or PCE (a measure of consumer-price inflation). That omission may indicate the Federal Reserve is considering a different inflation measure. A signal that a new gauge could be introduced might weaken expectations for additional rate hikes, which markets could interpret as dovish and potentially push the dollar lower.