Yahoo YHOO -6.11% came under renewed scrutiny by federal investigators and lawmakers on Thursday after disclosing the largest known data breach in history, prompting Verizon Communications VZ 0.35% to demand better terms for its planned purchase of Yahoo‘s internet business.
Shares of the Sunnyvale, California-based internet pioneer fell more than 6% after it announced the breach of data belonging to more than 1 billion users late on Wednesday, following another large hack reported in September.
