Why Arm Holdings Plunged Nearly 20% in December

Shares of Arm Holdings (NASDAQ: ARM) 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 (OTC: SFTB.Y).

It was actually a relatively light news month for Arm, but a skeptical investing public tended to take profits in December after a strong run to the year for semiconductors.

Source Fool.com