An Indian man has pleaded not guilty to charges that he hacked into online brokerage accounts in order to manipulate stock prices.
Jaisankar Marimuthu, 34, of Chennai, was extradited to the US from Hong Kong on June 20, making him the latest to face charges in what authorities described as an international "hack, pump and dump" scheme. He entered a not guilty plea in US District Court for the District of Nebraska on June 25, according to court records.
Marimuthu had already been arrested by Hong Kong police on similar charges, the US Department of Justice (DoJ) said.
Another man, Thirugnanam Ramanathan, pleaded guilty to fraud charges stemming from the scheme and was sentenced to two years in prison in September. However, he was deported on Jan. 29, before serving his full sentence, according to Ian McCaleb, a DoJ spokesman.
A third man, Chockalingam Ramanathan, has been charged in the US but is still at large, McCaleb said.
The three were charged two years ago for a 2006 scheme in which they allegedly hacked into online brokerages or created new accounts using stolen identities, then bought and sold stocks in order to manipulate prices to their benefit.
They hacked into more than 60 accounts in nine brokerage firms, including ETrade and TD Ameritrade, according to authorities. One firm lost more than US$2 million because of the scam.
The men allegedly drove up prices of low-volume stocks they owned, such as Acordia Therapeutics, Pacel and IGI, by buying shares with the hacked accounts, then dumping the stocks before the price dropped, authorities said. In October 2006, they also manipulated the price of near-worthless "put" options for Google, which gave buyers the option of selling Google stock for $240 (about half its value at the time), authorities said.
How Marimuthu and his associates allegedly gained access to the brokerage accounts is unclear, but court filings suggest that he may have obtained them from Internet cafés used by American and European visitors to Bangkok. Marimuthu and the others stayed at the Raja Hotel in Bangkok in 2006, prosecutors said.
Wireless networks at hotels and Internet cafés can be a security risk, especially if they are unencrypted or use the cracked Wired Equivalent Privacy (WEP) system to secure network traffic.