I read this short story in an anthology back in either the late 90s or early-to-mid 00s, and I'm pretty sure it was published not terribly long before that.
I think the title of the story is the word in question - it's always shown as a bunch of characters printed over each other. The protagonist happens to see the word written down and, on a whim, asks his secretary or assistant if they know about it. The assistant, the next day, says that on his suggestion they invested in some random stock and they made a pile of money.
The protagonist then uses the word to guide a variety of decisions, and they always turn out well for him, until he realises he's being chased down, presumably by the people who discovered/developed the word and don't want him in on the deal. He jumps into a taxi, and the driver asks him where to go, and he uses the word. Unfortunately, the taxi driver was one of the people after him, and tells him that he should have used the word to ask which taxi to take. In the end, the bad guys have him trapped, and they ask him how he wants to die - he gives his answer, and the bad guy says "Good choice".