Elsewhere, Robinhood Markets Inc, under scrutiny after this year's trading frenzy for so-called meme stocks such as GameStop GME.N, on Thursday set the stage for its hotly anticipated IPO. For former Treasury secretary, Democratic stalwart and Harvard University professor Lawrence Summers, massive U.S. fiscal spending will set off inflationary pressures of a kind not seen in a generation. So non-farm payrolls -- already at the top of the economic indicators list -- has taken on extra significance as investors and policymakers assess whether inflation is here to stay and what that means for the Fed outlook.