* US Covid-19 cases rebound to six-month high
* Federal Reserve vice chair says rate hike likely in 2023
* Are US jobless claims stuck at a permanently higher plateau?
* Global growth slipped to 4-month low in July via PMI survey data
* Global value of negative-yielding bonds rises to six-month high ($16.5 trillion)
* German factory orders rebounded more than expected in June
* ISM Services Index rebounded in July, reaching record high (since 1997)
* US firms hired substantially fewer workers than expected in July, ADP reports: