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With a dispersion trade where one shorts rich index vol and longs stock vols, there is a short correlation exposure. If i short rich stock vol and long cheap stock vol (say i short Citi ATM call and long GS ATM call in a vega-neutral portfolio), is there a correlation exposure???

1) Implied volatility based on the Vanna-Volga model : VV-Premium = BS-Premium + W_rr * (Smile-RR-Premium - BS-RR-Premium) + W_bf * (Smile-BF-Premium - BS-BF-Premium) In the above equation, the BS-Premium is typically set using the ATM vol. Therefore, can we have an implied volatility BASED on...

Saw on tracker that remylebeau had revised his "Result" for Columbia MFE to "Admit"... guess adcom must had did a U-turn on him! amazing!

I am an international application to the CMU MSCF. According to CMU's website, TOEFL scores must be submitted using the following codes : Institutional code - 2074 Departmental code - 02 However, when i tried to order TOEFL score reports on the ETS system, the required departmental code "02"...