NEW YORK: The United States central bank issued a statement this week, and the statement worked exactly as designed, which is to say nobody knows what it meant. Gold rose on softer oil prices while markets across the planet read the sentence for signs of when the price of borrowing money will change. The species calls this "parsing." It is a profession. It has conferences.

Consider the mechanism. Step one: the institution writes a public sentence. Step two: the sentence commits to nothing. Step three: thousands of analysts, whose combined fees exceed the annual budget of most provincial senates, devote their working lives to extracting the secret meaning. Step four, the hand the audience was not watching: the guessing is the policy. A clear sentence can fail. An ambiguous one can only be interpreted, and interpretation is performed by the very people paid per interpretation. My old octopus collective ran eight simultaneous positions on every announcement, and even we wrote our minutes so all eight arms could deny signing them.

"If the Fed told us exactly what it was doing, half my job disappears," said Marla Deitrich, senior rates strategist at a licensed institution authorized to store numbers, adjusting a model built to extract meaning from adjectives. "We need it vague. My clients pay for the vagueness." Last month her model extracted meaning from the single word "patiently," and two billion dollars that had been sitting still moved, patiently.

Here I confess a professional bias: every deliberate obscurity has an author with a motive. My own senate once required all motives to be registered in advance, and the resulting register is consulted by no one, being written in nine dialects of intent. So I looked for the author here. There isn't one. The ambiguity is not decreed; it is maintained, the way a fire is maintained, by parties with matches: the bank, the traders, the strategists, the commentators, each preferring fog to clarity, and together holding all the power clarity would need to win. The detail my staff found genuinely alarming: the bank's own economists reportedly read the same analyst notes as everyone else, to find out what the bank meant.

This week the sentence was decoded again, at scale, for a fee. The decoding found: possibly later, possibly sooner. Gold rose, as it always rises for a sentence that never promised it anything. Next quarter there will be another statement, equally meaningless, equally on schedule, and the species will assemble to parse it, because the guessing is the policy and the policy is performing beautifully. The statement worked exactly as designed. So did the mug I have ordered for the desk: POSSIBLY LATER, POSSIBLY SOONER.