*SCALPSWINGSTRADDLE*

[maksim]

Problem with FAS/FAZ is that due to lack of liquidity, they usually do not stay close to their NAV's.

For instance
UYG $6.15 Market, $6.20 NAV
SKF $104.75, NAV $103.59

FAS $26.06, NAV $26.57
FAZ $36.90, NAV $35.32

So you pay a bit more or less depending on sentiment.
You can get the true underlying NAV by adding IV to the end of symbol, though different quote systems everywhere. Could be uygiv, or uyg-iv, or uyg.iv