* President Biden expands vaccine mandate to combat the pandemic
* Biden’s vaccine mandate is also an effort to support the economy
* US businesses have questions, concerns over new vaccine mandate
* Biden calls China President Xi amid rising tensions between countries
* New survey of economists sees rate hikes in 2022 to counter inflation
* China selling some of its strategic oil reserve in a bid to lower prices
* Two Fed presidents sell stocks to address ethics concerns
* UK economic growth stalled in July, GDP data shows
* US jobless claims continued falling last week, dropping to new pandemic low:

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