A 23-YEAR-OLD stock registration clerk who deceived his friend was yesterday told by District Court Judge Chua he had ''behaved outrageously''. Pong Kwok-wing was found guilty of three charges of obtaining property by deception in July 1991 and was jailed for two years. Pong owed his employer, a stockbroking firm, Kwong Fat Hong, about $162,000. The court heard he had lost the money gambling in Macau. Mr Neil Mitchell, prosecuting, said it was Pong's job to register all the stock and shares transactions of the firm's customers. In June 1991, Pong opened a trading account with his company for a friend, Mr Fung Wing-wa. About a month later Pong phoned a colleague who was responsible for receiving orders on the trading floor of the Hongkong Stock Exchange. Pong claimed he was selling on behalf of a customer 25,000 share warrants of Hutchison Whampoa as well as 50,000 share warrants of Cheung Kong Holdings. The colleague then sold the share warrants on the stock market. Mr Mitchell said that on the same day, the defendant made false entries in the daily buying and selling record list to the effect that Mr Fung had sold the two lots of share warrants. The record list was then presented to another colleague who was responsible for issuing cheques. Cheques of $345,917 in favour of Mr Fung were made. The following day, Pong again falsely stated he was selling 30,000 share warrants of Cheung Kong for Mr Fung and false entries were made and another cheque for $143,200 was made out. The court heard that Mr Fung was never told of the transactions. Pong deposited the cheques into Mr Fung's account, then told him that he had deposited some money into his account and asked him to sign two blank cheques and forward them to him. Pong made use of the two blank cheques to withdraw the money from Mr Fung's account. About a week later, the company supervisor checked the records of transactions and found that the company had not received the three lots of warrants purportedly sold by Mr Fung. Mr Mitchell said Pong admitted he had deceived the firm by purporting to sell three lots of warrants on behalf of Mr Fung, took the cheques and spent the money. Pong said he was unable to repay the money.