Stock market news live updates: Stocks mixed as vaccine euphoria abates, tech selling continues

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Stocks were mixed Tuesday as investors reined in an initial wave of optimism over a promising vaccine candidate. Tech shares remained under pressure, and the Nasdaq dipped further after Monday’s losses.

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News that a Pfizer (PFE) and BioNTech’s (BNTX) vaccine candidate was more than 90% effective in preventing COVID-19 in patients in its clinical trial helped fuel a market rally earlier on Monday. During the regular session, the S&P 500 and Dow rocketed to intraday records, with the latter index adding as many as 1,610 points, or 5.7% at session highs. However, both indices pared some gains into market close.

“I think the big surprise here was the efficacy. I think you had polled investors before this, the efficacy range would have been 50-75% as sort of a wide range,” Stuart Kaiser, UBS Head of Equity Derivatives Research, told Yahoo Finance on Monday. “And if this number is truly 90% or above, I think that is what the market is responding so positively to.”

More positive news from companies working on COVID-19 vaccines and therapeutics came out during the overnight session. Eli Lilly (LLY) said its antibody therapy for treating mild to moderate COVID-19 in high-risk patients had received emergency use authorization from the U.S. Food and Drug Administration. Shares of the drug-maker rose more than 3% in early trading.

Shares of cruise lines, airlines and lodging companies – which each stand to benefit from the increase in consumer confidence that an effective vaccine might confer – gave back some gains after surging during the regular session.

Many of the tech stocks that had led the market higher earlier this year did not participate in Monday’s rally, however, and continued to sell off Tuesday morning. Investors unloaded positions in software names that had climbed throughout much of 2020, as traders treated them as safer bets while the pandemic threatened to keep people mostly at home. Other safe haven assets, including gold, silver and U.S. Treasuries, steadied Tuesday morning after tumbling during Monday’s session.

A successful vaccine has widely been viewed by investors, company executives and politicians as the key component of a broad-based economic reopening and sustained recovery. About 27 million workers, or around 22% of the U.S. workforce, are in occupations that require close physical proximity, Torsten Slok, chief economist for Apollo Global Management, pointed out in a note, with many of these workers having been put out of work by the fall-out from the pandemic and social distancing orders.