Vix
August’s volatility thunderbolt rattles risk managers
Investment firms mull changes to value-at-risk models after never-before-seen spike in volatility index
Triggers of August market ‘flare-up’ still in place, BIS warns
Leveraged positions remain at risk of sudden unwinding, as margin calls play amplifying role
Pre-market trades blamed for record Vix surge
Traders rushed to cover short vol positions before the market opened on August 5
After the selloff, competing theories on dealer gamma
Tier1 Alpha sees $74 billion short gamma catalyst; SG says rapid return to positive territory had calming effect
Covid halted variance trading. Can Cboe revive the market?
With liquidity in variance swaps drying up, traders may finally be ready to give futures a shot
Gamma jitters from defined outcome funds
Tumbling equity markets could flip dealers’ exposure to gamma from long to short, leading to hedging losses
Equity vol convexity selling gains momentum
Risky hedging strategy is attracting interest but can investors learn from past convexity blow-ups?
‘Fear gauge’ within expectations, some say
Several options specialists dismiss claims that structured products are distorting the Vix
Options market still searching for cause of the Vix plunge
BIS paper blames yield-enhancing structured products, but market participants are unconvinced
Zero-day hedging takes root in new asset classes
Option users move beyond equity indexes in search of cheaper, sharper hedging tools
Podcast: Julien Guyon on volatility modelling and World Cup draws
Academic discusses option pricing, path-dependent volatility and tackling FIFA’s statistical bias
Does the term structure of the at-the-money skew really follow a power law?
A power law can fit the ATM skew, but struggles with short maturities
The quintic Ornstein-Uhlenbeck model for joint SPX and VIX calibration
A new model that jointly fits the smiles of VIX and SPX is presented
Zero-day spikes vanish as bank worries exceed inflation fears
Implied volatility for short-dated options points to shift in sentiment after SVB failure
‘Spectacular’ vol disconnect ‘ominous’ for risk assets
Historic divergence has caught the eye of Boaz Weinstein and others
Least squares Monte Carlo methods in stochastic Volterra rough volatility models
The authors offer a VIX pricing algorithm for stochastic Volterra rough volatility models where the volatility is dependent of the vol-of-vol which reproduces key features of real-world data.
Enhanced expected impact cost model under abnormally high volatility
The authors extend their impact cost model beyond the typical factors to address the larger transaction costs brought on by stock market crowding effects in times of market turbulence.
Deep calibration of rough volatility models
Rough vol models are calibrated and fitted to SPX and Vix smiles
Multilevel Monte Carlo simulation for VIX options in the rough Bergomi model
The authors consider the pricing of the Chicago Board options Exchange VIX, demonstrating experiments highlighting the efficiency of a multilevel approach in pricing of VIX options.
Return of volatility revs up FX options market
Macro disruption hikes volatility for eager dealers, however liquidity and spread compression remain a concern
Future portfolio returns and the VIX term structure
The authors use a measure that captures the expected evolution of risk and generate results supportive of the concept that there are multiple facets within volatility risk that are priced individually.