Quantitative tightening, or QT, could see the ECB shrink its gigantic bond portfolio.
"We expect the ECB to raise its policy rates by 50 bp at the December meeting," said Michael Schumacher, an ECB watcher with Natixis, in a recent research note.
"We also expect an announcement of Quantitative Tightening next year, though the ECB is unlikely to provide a specific start date at this point."
Another hot topic for the ECB's Governing Council, which concludes its meeting Thursday with a press conference, will, of course, be inflation and possible peak inflation.
"While Inflation likely peaked in October, we see core inflation lingering above 5% until mid 2023 before trending lower," said Anatoli Annenkov at Societe Generale in a recent research note.