Investor behavior has reached an extreme not seen in 15 years. Here’s why that could be signaling a stock-market explosion to new highs.

Investor behavior has reached an extreme not seen in 15 years. Here’s why that could be signaling a stock-market explosion to new highs.

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  • A recent study from Bernstein found that flows into bonds and out of stocks have diverged to a degree not seen in 15 years.
  • The firm said this ongoing bifurcation could send stocks soaring higher in the future and provided historical context to support its assertion.
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The word “rational” rarely comes to mind when investors think about the mercurial day-to-day gyrations of the market. When tensions and emotions run high, it’s easy to focus on the minutiae, make ill-informed decisions, and lose a sense of the bigger picture.

The quantitative-strategy team at Bernstein believes investors have done just that. In a new research note, the firm sounded the alarm on the glaring divergence between recent flows into bonds and the corresponding exodus from equities.

Since the beginning of the year, total equity-fund outflows have tipped the scales at $155 billion, while bonds absorbed aggregate inflows of $182 billion over the same period. That marks the largest bifurcation between the two asset classes in 15-plus years.

“There are often tensions like this in the market, but the degree of this tension is at the extremes of historical experience,” Inigo Fraser-Jenkins, a senior analyst at Bernstein who leads the firm’s global quantitative and European equity strategy, said in the client note.

And at present time, this extreme trend is showing no signs of stopping. Last week alone, net bond inflows grew $17.5 billion — the largest deposit in more than four years — while investors redeemed $10.5 billion worth of equity holdings.

The graph below shows just how out of whack flows are compared with the past.


But there’s one big catch: Bernstein finds that, historically speaking, these overextended conditions have portended large stock-market gains ahead. And considering the benchmark S&P 500 is already roughly 2% from all-time highs, a new record seems imminently attainable.

The chart below — which shows the forward returns for global stocks when Bernstein’s indicator has moved more than two standard deviations away from its average — provides investors with a sanguine outlook for equities when these metrics are overemphasized. The most compelling column is arguably the rightmost one, which shows 52-week gains exceeding 10% following each prior instance.


Today, the disparity is even more exaggerated — crossing over three full standard deviations — which strengthens the case for a reversal.

Ultimately, Bernstein believes that irrational investor behavior has overexaggerated current allocations — setting the stage for what could be a sharp, forceful turnaround over the medium term.

However, it’s important to note that even though these metrics are stretched on a historical basis, Bernstein doesn’t see a sharp, short-term trend reversal without an exogenous catalyst or event to get the ball rolling.

When areas of the market are this afflicted, historical analysis and proper positioning can set investors up to reap the rewards of this reversion to the mean.


Bond Market

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