US stock index futures held near all-time highs on Friday as increasing prospects for further economic stimulus and continued optimism over a coronavirus vaccine-fueled economic recovery elevated sentiment.A bipartisan, $908 billion coronavirus aid plan increased momentum in the US Congress on Thursday, after a months-long standoff between Republicans and Democrats over a stimulus package for businesses and millions of people affected by virus-fueled shutdowns.A labor Department’s closely monitored report, expected at 8:30 am ET (1330 GMT), is likely to indicate US employers hired the lesser workers in six months in November, hindered by a resurgence in coronavirus cases and a lack of more government relief money.The unemployment rate is expected to dip to 6.8% in November from 6.9% last month.