‘The Automatic Flow That Poses The Most Immediate Risk Is VIX ETPs’: Goldman Takes On The ‘Doom Loop’

When the proverbial shit hits the fan, don't blame risk parity and the trend followers. Rather, point the finger at the Target manager next door.

One of the most important questions for markets going forward is whether the presence of systematic strats and the proliferation of VIX ETPs will ultimately conspire to create what we’ve variously described as “the doom loop.”

We’ve written copious amounts of posts about this dynamic which you can peruse at your leisure here.

When stripped of the technicalities, the premise is pretty simple as these things go. Levered and inverse VIX ETPs would be forced to rebalance on a nominally small vol. spike and to the extent that rebalance exacerbates said spike, vol. control funds, CTAs, and risk parity could be forced to deleverage into a falling market.


This has become one of the rallying cries of the “Chicken Little” contingent and it’s a topic that JPMorgan’s “Gandalf” (Marko Kolanovic) has been keen on warning about for quite some time. The quant crowd isn’t fond of the notion that they’ll be an aggravating factor in the next plunge and the VIX ETP crowd doesn’t generally understand the role they’re playing in what amounts to a buildup of systemic risk.

There are plenty of people who will tell you why none of what I’ve just said is possible and indeed, there are some folks who will claim it doesn’t make much sense at all, but I would submit that those rebuttals will one day be looked back on as something akin to “famous last words.” So you know: “time stamp it.”

Well in a sweeping new note out Tuesday, Goldman takes a look at this dynamic asking “would automatic flows exacerbate a potential selloff?”

“In moments of stress, products that de-risk when risk rises (including volatility control strategies and trend-following strategies) can create feedback loops,” the bank notes, echoing our “doom loop” characterization. Here’s some further color:

Volatility control strategies typically sell equities when vol rises above a threshold, but with vol well below-target a prolonged pickup in vol would likely be needed. The S&P 500 Managed Risk – Moderate Index, which consistently would have had 7-10% 12-month rolling realized vol in its history, has now had 5% realized vol over the past 12 months. A quick selloff would drive this index and the large funds that have similar strategies to start realizing near-target vol, rather than above-target, so we would not expect them to de-risk in an initial pickup in vol.

Growth in levered, short VIX ETPs has increased their potential feedback loop impact. Over the past few months, the combination of product inflows (to long VIX ETPs, as a hedge), strong performance (of short ETPs, following +135% YTD performance), and low VIX futures prices (allowing more futures to “fit” inside each ETP share) have brought the gross VIX ETP market size to a new high (the net size with offsetting long and short products is less long than usual).


That second paragraph underscores the notion that when it comes to the “doom loop,” VIX ETPs are the biggest risk. Here’s Goldman again:

The automatic flow that has changed the most of late – and that poses the most immediate risk – is VIX ETPs, after recent growth of the leveraged and inverse products.

Large levered and inverse VIX ETPs help make vol move faster. When VIX futures are rising, levered and inverse products buy VIX futures, creating a feedback loop. Levered funds buy VIX futures when they rise, because their NAVs rise twice as fast as the value of their underlying VIX futures in percentage terms, leaving the futures position insufficient for the now-larger ETPs. Similarly, inverse funds cover short VIX futures when they are rising.

A 3-point VIX futures spike in prices would drive ETP issuers to buy more than 50% of average volume of VIX futures. A 3 point jump would leave vol below-average, yet create demand for over $100mm vega (100k VIX futures), potentially driving vol up further. This number would have been around $50mm vega on a typical day in 2016. The amount of rebalancing has been boosted by low VIX futures levels, making an N-point move a larger percent of the current level of VIX futures. This effect has been largely untested in 2017 because of the lack of large SPX moves.


So there you go.

When the proverbial shit hits the fan, don’t blame risk parity and the trend followers. Rather, point the finger at the Target manager next door.



2 comments on “‘The Automatic Flow That Poses The Most Immediate Risk Is VIX ETPs’: Goldman Takes On The ‘Doom Loop’

  1. bigbritheacguy0001

    See, this is the reason why I follow Mr. Heisenberg.

    Now, I just got done eviscerating him, (OK, that is possibly a little strong, but he might have a little tummy-ache), for his previous political post. I wish he would stick to his knitting and create an investment site for articles like this and create a different political rant site for his other clientele. In my humble opinion Mr. Heisenberg, you would do much better separating these two segments because with this business model you are alienating somewhere around half of your subscribers who would otherwise be completely satisfied with your market based analysis.

    It is counter-productive to try to mix the two. But then, I guess one has to ask what your motives are.

    • my business is doing just fine. if you don’t like it, you can fuck right on off and you can take your clicks right on with you.

      how’s that sit with your “tummy”?

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