Mastercard (MA) stock after hours today (Dec. 18, 2025): what to know before Friday’s market open
Mastercard shares closed at $566.21 Thursday, up 0.13%, then slipped to about $565.13 in after-hours trading. Volume was near 2 million shares, below the previous day. The S&P 500 and Nasdaq both rose after U.S. inflation data, while investors weighed new headlines on card-network fees and a reported Abu Dhabi blockchain initiative involving Mastercard.