By Rodrigo Campos NEW YORK (Reuters) – Cynk Technology shares plummeted more than 80 percent on Friday after the end of a temporary trading suspension, but the stock was only being exchanged in private deals. In mid-morning trading, Cynk was down 82 percent at $2.50 as 255,000 shares changed hands. OTC Markets Group, where the stock had traded prior to its suspension by the U.S. Securities and Exchange Commission, was not used for the trades, a spokeswoman for OTC Markets said. “Those transactions are taking place over the phone,” said Saskia Sidenfaden, spokeswoman for OTC Markets Group.