VMware Inc. /zigman2/quotes/209864107/composite VMW +1.14% shares tumbled 4% in extended trading Thursday after the software company withdrew its previously issued financial guidance for fiscal 2021. In an 8-K filing, VMware warned it is "unable to predict the extent to which the global COVID-19 pandemic may adversely impact its business operations, financial performance and results of operations." VMware plans to provide more information during its fiscal first-quarter earnings call on May 28. VMware shares are down 30% in the last year. The broader S&P 500 index /zigman2/quotes/210599714/realtime SPX +2.62% is down 6.6% in the last year.