The Great Lockdown will be the worst downturn since the Great Depression, says the IMF. It warned this week that the Australian economy will slump by 6.7% in 2020, followed by a recovery in 2021. While the economy is not the stock market, there's a disconnection at the moment. Despite the poor outlook, price/earnings ratios for both the S&P/ASX200 and the S&P500 are still well above long-term averages.