Shares of CDI Corp. (NYSE:CDI) saw unusually-strong trading volume on Tuesday following insider buying activity, MarketBeat.Com reports. Approximately 115,869 shares traded hands during mid-day trading, an increase of 10% from the previous session’s volume of 105,364 shares.The stock last traded at $6.70 and had previously closed at $6.57. Specifically, Director Albert E. Smith acquired 4,000 […]