* Global ­middle class shrank last year–first time since 1990
* Brazil’s Covid-19 deaths set to exceed worst of US wave
* Markets pricing in a Fed rate hike for 2022
* Debt and climate change are rising risks for dozens of countries
* IMF raises 2021 growth estimates for US and global economy
* Eurozone economy rebounded in March via PMI survey data
* US job openings rose in February to two-year high: