Stock futures fluctuate as investors pause ahead of this week's Fed gathering; Salesforce and Snowflake report earnings; GameStop and AMC surge in a renewed rally of meme stocks.

Stock futures rise Wednesday as Fed officials seek to ease inflation worries; Nvidia reports earnings; Bitcoin rises above $40,000; AMC and GameStop extend gains.

Zuora, producer of systems that enable companies to manage subscription businesses, reported a narrower fiscal-fourth-quarter loss on 13% higher revenue.

Stock futures rise on a weaker-than-expected report on U.S. inflation; AMC's sales slump but the movie theater chain's CEO is optimistic; Boeing reportedly is close to a large 737 MAX order with Southwest.

A Wall Street rally fueled by vaccine breakthroughs is tempered by the deadliest day in the U.S. from Covid-19; Snowflake issues a soft product sales forecast; Splunk sinks after reporting a wider-than-expected third-quarter loss.

"Supply chain challenges and persistent delays significantly limited the brand's responsive abilities" to changing consumer trends, CEO Sonia Syngal told investors Thursday.

"We believe the slowdown was caused by the spending pressure our consumers felt from higher gas prices and broader inflation," said CEO Bruce Thorn.

Costco took in $984 million in new membership fee in its fiscal third quarter, helping the bulk retailer top Street forecasts for topline revenues.