Facebook shares roller coaster as it rides change

Spending on security and election-related defenses were part of the reason overall costs and expenses reported in the quarter rose 53 percent to $7.95 billion from $5.2 billion a year earlier.

Zuckerberg said Facebook is up against sophisticated adversaries who continue to evolve.

“These aren’t problems you fix, they are problems you manage,” Zuckerberg said of the challenge.

“There is no silver bullet.”

In what could wind up costing Facebook more money, British finance minister Philip Hammond said he planned to introduce a digital services tax aimed at tech giants from 2020, responding to public outrage over low tax payments by US tech giants.