Sunny Verghese, group managing director and chief executive officer of Olam International.

Olam CEO Sunny Verghese defended the company's performance after the shares slumped nearly 40 percent over the past year, and called the stock move a lagging indicator of progress at the Singapore-listed commodities trader.

Olam shares, which came under attack by U.S. short-seller Muddy Waters Research last year, have declined 37 percent over the past 12 months, far underperforming the broader Straits Times Index (STI), which rose 11.6 percent over the same period.