April Lee Tan, research head of CitisecOnline, noted that officials of mobile giant PLDT have been buying the company's own shares after Sen. Panfilo Lacson's expose last week dragged its shares down. When asked by ANC's Business Nightly if it's a good time to buy PLDT shares now, Lee Tan said this company strategy tend to send the message to investors that "there's no hidden value." Nonetheless, she noted that the market value for cellular phone business is already maturing with growth rates slowing to 2-3% per year starting next year.