Sentence:  A financial dealer has an <WSD>axe</WSD> in a stock that his buyers don't know about, giving him an advantage in making the most profit. 
Meaning of the word marked with <WSD> tags:  A position, interest, or reason in buying and selling stock, often with ulterior motives.<ref>[http://www.risk.net/public/showPage.html?page=132529 Shedding the correlation ‘axe'], Risk magazine</ref>