The Dow Jones Industrial Average late-day Thursday was trading higher, putting the index on track for its biggest comeback in about 8 weeks amid the COVID-19 pandemic. The Dow /zigman2/quotes/210598065/realtime DJIA +1.55% was up 244 points, or 1.1%, at 23,486, following a skid that saw it lose as many as 458 points at its intraday nadir at 22,789.62, or down nearly 2%. If the benchmark manages to end higher for the day it will mark the biggest intrasession rebound since March 19, according to Dow Jones Market Data. Gains were being driven by an nearly 7% advance in American Express Co. /zigman2/quotes/203805826/composite AXP +2.38% and a 4.4% gain in shares of UnitedHealth Group Inc. /zigman2/quotes/210453738/composite UNH +4.03% , which were helping to lead the charge. The S&P 500 index /zigman2/quotes/210599714/realtime SPX +0.70% was up 0.4% at 2,832, powered by a gain in the financials sector /zigman2/quotes/209660484/composite XLF +1.41% , a rally in materials names /zigman2/quotes/204467551/composite XLB +1.28% and health care /zigman2/quotes/205918244/composite XLV +1.77% . The technology-laden Nasdaq Composite Index /zigman2/quotes/210598365/realtime COMP +0.22% was trading at around unchanged at 8,870, but well off its lows at 8,705.25.