It was a special, romantic dinner. Mr. Market glanced appreciatively at Ms. Yellen as they shared a crème brûlée and sipped their coffees. She had never looked more beautiful. The question on his mind: would she say “considerable time” or “patient?” One meant one thing, the other something else. He knew not to ask; she always gave him what he wanted, what he needed, in her own sweet time. Her mystery was a big part of her allure.

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