Pfizer Inc could have a COVID-19 vaccine available in the world's largest economy by the end of 2020.
Top tech brands drifted lower, as investors fretted over uncertainty around the COVID-19 pandemic.
The US dollar is stronger this morning on the back of a marked drop in risk appetite in European and US markets.
Futures contracts on the S&P 500 Index plunged by 1.4% at the time this report.
Apple Inc, the most valuable listed company, plunged in value by 3.17% to close at $106.84.
The first time since March, both indexes had a drop for the fourth time in five days.
Recent sell-offs were triggered by leading tech brands including Facebook, Amazon, Google.
Global Stocks ended the week mixed on the present prevailing macros.
At the currency exchange rate under the investors and exporters (I&E) window, the naira dropped slightly to close at 386.8.