Shares of Mastercard (MA) slumped in trading on Monday, ending the day down -4.18% to settle at 143.43. However, after regular hours trading, the company reported that it had reached an agreement with the board of directors to begin a new $4B share repurchase program. This is to begin after the previous $4B repurchase program is completed. Currently, there is about $1.5B in share repurchases still remaining from the previous share repurchase agreement. Keep an eye on the MA tomorrow as movement is likely.