Little evidence of wrong-doing has emerged publicly so far. Infosys pledged a full investigation Tuesday, while Parekh himself has remained silent. Yet investors blind-sided by the sheer volume of the charges wiped more than $7 billion off the company's market value in a single day. They may still be smarting from 2017, when internal upheaval eventually sparked an ouster of the popular Vishal Sikka, paving the way for Parekh's ascension and a board reshuffle.