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I don't understand how Bloomberg quotes ATM swaptions, they just show the same volatility/premium and don't separate calls and puts. Are they the same? How does it tie to normal volatility? Thanks

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    $\begingroup$ Also quant.stackexchange.com/a/71555/54838. Atm premium quoted is usually a straddle. Bloomberg has a help desk which would answer these type of questions swiftly (F1 F1). Or you look at the DES page of the ticker. $\endgroup$
    – AKdemy
    Apr 13, 2023 at 15:40
  • $\begingroup$ If the premium is quoted as straddle, is there a way to separate call and put prices? $\endgroup$ Apr 13, 2023 at 16:04
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    $\begingroup$ Of course. Strike is ATM, which means you back out vol and compute call and put. The linked answer essentially explains this, as well as what normal vol or black vol is. $\endgroup$
    – AKdemy
    Apr 13, 2023 at 16:14

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