Why Arm Holdings Plunged Nearly 20% in December

Arm faced an analyst downgrade and fears over potential selling pressure from its largest shareholder.Shares of Arm Holdings (ARM 0.60%) fell 19.4% in December, according to data from S&P Global Market Intelligence.Arm didn't report any financial news during the month, but its high valuation came under scrutiny following an analyst downgrade and the potential for selling pressure from its largest shareholder, Softbank (SFTB.Y 1.21%).NASDAQ : ARMArm HoldingsToday's Change( -0.60 %) $ -0.69Current Price$ 114. ...