The Momentum Unwind: Why Do Things Snowball?

Oct. 11, 2018 1:18 PM ET, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 113 Comments
The Heisenberg
29.09K Followers

Summary

  • Fascination with Wednesday's selloff has only grown in the 24 hours since losses on Wall Street started to snowball.
  • When sorting through the wreckage, one finds a dramatic unwind in Momentum.
  • It's critical to understand why markets act the way they do on days where things get moving in the wrong direction.
  • Here's (another) trip down the modern market structure rabbit hole.

After ripping through a half-dozen early posts over on my site Wednesday morning, I pivoted to this platform and put digital pen to digital paper in the interest of sounding the alarm for readers amid what, to my mind anyway, looked like a potentially dangerous selloff in U.S. equities.

That linked post began with the following disclaimer:

Let me say upfront that this comes with the usual caveat as regards intraday posts for this platform: Things could turn around by the time it's published.

I needn't have bothered. By the time the closing bell sounded on Wall Street, traders were sorting through the wreckage of an 800+ point dumpster fire in the Dow (DIA). It was the third worst point drop of the year, eclipsed only by the two 1,000+ point down days in early February. But the real story was the Nasdaq (QQQ), which had its worst day since Brexit.

(Heisenberg)

For what it's worth, the S&P 500 (SPY), Russell 2000 (IWM), and the Nasdaq 100 all ended in oversold territory. As the following visual shows, this is the first time that's happened since January 2016:

(Bloomberg)

One of the things I tried to make clear in Wednesday's post (and really, this was the critical point), was that the anomalous character of the bond selloff is effectively exacerbating what would already be a precarious situation.

When rates rise rapidly (for instance, when 10-year yields jump by more than 2 standard deviations in the space of 30 days), you're likely to get selling pressure in stocks too. In the simplest possible terms, the key determinant of a flip in the equity rates correlation is the rapidity of the rise in yields. Recently, yields have risen rapidly enough to flip the stock-bond return correlation positive (equity-rates correlation negative). That's the narrative behind the weakness in

This article was written by

29.09K Followers
Perhaps more than any other time in the last six decades, the fate of markets is inextricably intertwined with the ebb and flow of geopolitics. It's become increasingly clear that one simply cannot fully comprehend market movements without a thorough understanding of concurrent political outcomes. Drawing on extensive experience in both politics and finance, Heisenberg will help demystify a world in which investors can no longer hope to conceptualize of markets as existing in anything that even approximates a vacuum.

Analyst’s Disclosure:I/we have no positions in any stocks mentioned, and no plans to initiate any positions within the next 72 hours. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it (other than from Seeking Alpha). I have no business relationship with any company whose stock is mentioned in this article.

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