The US markets were up strong yesterday after a week of big gains. The market moving news was (in part) that China claims it will finally let its currency (yuan) appreciate against the dollar. The prior stance has been to peg the yuan to the US dollar (no floating rate).

The Two Faces of Volatility

by Dan Passarelli | Jun 22, 2010 | Trading & Analysis

In Roman mythology the god of beginnings and endings, Janus, is typically portrayed having two heads, each facing in opposite directions. His countenances are displayed in this manner so that he can observe the past as well as the future. The two types of option volatility, historical volatility and implied volatility, also reflect this dual perspective.

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