This reporting season is expected deliver more strong earnings growth, and cap-off a year which profits grew by 40% a share, but the future looks less certain with the rate of growth tipped to plateau into 2022. The Key Questions for the earnings season: 1. How strong are profits now and looking ahead? According to financial data company FactSet, the market ought to deliver S&P500 earnings growth of 21.7%. That figure would be lower than the 3rd quarter if it materializes, but still above its long-term average, and would take full year earnings growth in 2021 to around 40%. A key issue for market participants will be what corporates say about future profits, with the rate of growth tipped to plateau going into 2022. EPS was only modestly revised higher for theS&P500in the last quar