Shares of Aladdin Knowledge Systems Ltd. (Nasdaq:ALDN) are treading lower ahead of the opening bell after the provider of information security services and products this morning reported first-quarter earnings a penny shy of the consensus on Wall Street on account of a negative impact from currency exchange rates, as a strong Israeli shekel raised operating expenses. The company also lowered its fiscal 2008 earnings estimate below analysts’ projections.

Shares slid 12%, or $2.74, to $19.01 ahead of the opening bell. For detailed price information and recent news stories about Aladdin Knowledge Systems, click ALDN. 

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