Cybersecurity ETFs Strengthen as Twitter, Spotify, Netflix, Amazon Suffer Attacks

Cybersecurity ETFs capitalized on the internet’s woes Friday as traders looked to companies that can help counter future attacks on big online names.

On Friday, the PureFunds ISE Cyber Security ETF (NYSEArca: HACK) rose 1.2% and the First Trust NASDAQ CEA Cybersecurity ETF (NasdaqGM: CIBR) gained 0.3%.

CyberSec companies rallied after a distributed denial service (DDoS) attack took down systems run by Dyn Inc., one of the largest internet service providers in the world, USA Today reports.

Two successive attacks blocked multiple major websites early Friday, cutting off access to Twitter (NasdaqGS: TWTR), Spotify, Netflix (NasdaqGS: NFLX), Amazon (NasdaqGS: AMZN), Tumblr and Reddit.

“This attack is mainly impacting US East and is impacting Managed DNS customers in this region. Our Engineers are continuing to work on mitigating this issue,” Dyn said.

Denial of service attacks occur when someone or a group floods a particular site or service with a sudden influx of fake traffic to overwhelm the system and to take it offline.