["Fed's Mouthpiece": Friday's Inflation Report is Key to Whether the Fed Raises Rates] Nick Timiraos, known as the "Fed's Mouthpiece," stated that Waller's speech at Jackson Hole has led investors to believe that the likelihood of a rate hike is higher. However, he did not specify what would trigger the hike. The market has filled in this information gap, and now the rate hike expectations are at levels Waller never committed to. Therefore, Friday's inflation report is seen as the key determinant of whether rates will be raised, though Waller has opposed this decision-making approach for years.