Beneath the calm surface of US stocks, turbulent currents are swirling. Although the S&P 500 Index is less than 1% away from its all-time high, the degree of internal divergence within the market has reached its worst level since the dot-com bubble burst, with institutional investors rushing into "safe assets" at a pace not seen since the COVID-19 shock.

According to the latest report from Goldman Sachs (GS) flow-of-funds strategist Lee Coppersmith, the GS Quality Factor has gained more than 16% over the past 8 weeks, a magnitude of move that has not occurred since the COVID-19 shock in 2020. At the same time, tech stock fund flows have undergone a sharp reversal 鈥?the tech sector, which had topped net buying for several consecutive weeks, suddenly became the sector with the largest net selling last week, with its long-short ratio falling to the 17th percentile over five years.

Goldman Sachs (GS) believes that although risk-aversion sentiment within the market has risen significantly, an extremely concentrated market structure has historically not been a bearish signal, and the S&P 500 Index is still expected to continue rising over the next 1 to 3 months. Oil prices and interest rate trends remain the primary downside risks.

The Index Masks the Truth: Internal Market Divergence Worst Since the Dot-Com Bubble

The calm exterior of the S&P 500 Index is masking a deep structural divergence.

According to Goldman Sachs (GS) data, the median stock among S&P 500 constituents has now fallen 16% from its own high, while the index as a whole remains less than 1% from its all-time high. By the market breadth measure favored by Goldman Sachs (GS), current market breadth has deteriorated to its lowest level since the dot-com bubble burst.

Lee Coppersmith pointed out that the clearest manifestation of this divergence is the "extraordinary flight to quality assets" currently underway. The GS Quality Factor has risen more than 16% over the past 8 weeks, a pace that typically only appears during periods when the market is under significant stress, rather than when the index is hovering near all-time highs. "Beneath the surface of the SPX, there is far more risk-aversion sentiment than the index suggests," he wrote.

Sharp Reversal in Tech Fund Flows, Industrials See Fastest Buying of the Year

The tech sector's fund flows have seen the most notable turning point of this market cycle.

According to Goldman Sachs (GS) Prime data, tech stocks had ranked first in net buying in four of the previous five weeks, but last week suddenly became the sector with the largest net selling, with selling on both the long and short sides 鈥?both long unwinding and new short additions. The tech sector's long-short ratio has dropped to 1.8, at the 17th percentile over five years. Notably, the sector's total position size remains at the 97th percentile over five years, meaning the capital stock is still substantial, but the willingness of marginal buyers has diminished significantly.

Meanwhile, the industrials sector saw its fastest pace of buying since January of this year (+1.8 standard deviations), almost entirely from new long positions, after the sector had been net sold for five consecutive weeks. The financials sector also attracted inflows, while the software sector showed relative strength. Goldman Sachs (GS) views this as an initial sign that capital is beginning to look for opportunities outside the mainstream leadership sectors, and whether it evolves into a sustained trend is worth continued observation.

In addition, the consumer staples sector was net sold in seven of the past eight weeks, with its long-short ratio falling to the 3rd percentile over five years; the biotech sector experienced its largest cumulative eight-week total position compression in more than five years.

Extremely Light Positioning, Historical Data Supports the Index Continuing to Hit New Highs

Despite strong risk-aversion sentiment within the market, Goldman Sachs (GS) believes the current positioning structure actually constitutes potential upward support.

The GS US Equity Sentiment Indicator currently reads -1.3, placing it in a range where historical forward returns have been relatively favorable. Global fundamental long-short fund net leverage is at the 6th percentile over the past year (2nd percentile for US-only), and overall hedge fund net leverage is at the 10th percentile. Although total position size remains relatively high, confidence in directional judgment has clearly weakened.

Regarding historical patterns, Bloomberg statistics show that since 1995, in 13 instances where the top 10 S&P 500 constituents outperformed the equal-weighted index by more than 8%, the median S&P 500 return over the subsequent six months was +10.1%, and the median 12-month return was +19.6%, both above the historical medians of +6.9% and +15%. The current performance gap stands at 855 basis points. Lee Coppersmith stated, "An extremely concentrated market leadership structure is historically fully compatible with the index continuing to rise."

Oil Prices and Interest Rates Remain the Biggest Tail Risks

Goldman Sachs (GS) believes that the core variables constraining further recovery in market sentiment remain oil prices and interest rates.

After the 10-year US Treasury yield broke above 5%, the Goldman Sachs (GS) rates team believes the asymmetry in yields has shifted to the downside, and rate volatility has also begun to decline. For US stocks, a major bond rally is not needed 鈥?merely a stabilization in interest rates would be enough to provide support.

However, oil prices and geopolitical tensions constitute significant disruptive factors. The Goldman Sachs (GS) commodities team expects Brent crude to fall back to $90 per barrel in December and average $80 in 2027, but simultaneously emphasizes that near-term risks are clearly skewed to the upside. More than $20 per barrel of risk premium remains embedded in current oil prices, supply disruption risks persist, and oil prices are the biggest potential threat at present.

In addition, Goldman Sachs (GS) also noticed a signal from the options market: Nvidia's downside implied volatility has fallen to a level never seen before the COVID-19 pandemic. As the world's largest company by market capitalization and the core target of the AI trade, Goldman Sachs (GS) believes this offers investors looking to hedge against AI trade unwinding risk or quality factor crowding risk a "hidden opportunity in plain sight."