S&P 500 Futures part ways from Wall Street's mild losses on mixed clues

S&P 500 Futures ignore downbeat performance of US equities, take the bids of late. US President Biden prepared to send 20 million authorized covid jabs, China backs vaccine patent waiver. Kaplan reiterates need for tapering talk, still expects first rate hike in 2022. US data, Fedspeak keeps markets subdued ahead of Wednesday's FOMC minutes. S&P 500 Futures portray risk-on mood with 0.28% intraday gains, around 4,170, during early Tuesday. In doing so, the risk barometer differs from the US equity benchmarks that flashed first negative daily performance in three the previous day. While checking the catalysts behind the move, optimism…