TL;DR: Tempus AI (TEM) saw its directional pressure score jump 20 points to 71.0, signaling strong bullish momentum on August 20, 2026. This move was driven by significant options flow, while Toll Brothers (TOL) and Carvana (CVNA) also registered large bullish shifts from market microstructure signals.
On 2026-08-20 ET, several stocks displayed sudden and substantial shifts in market directional pressure, according to Haruspex analysis. The broader market saw the S&P 500 edge up 0.21% to 7707.98 [data: 2026-08-20 close], reflecting a relatively stable environment.
Macro Environment Overview
| Metric | Current | Key Level |
|---|---|---|
| S&P 500 | 7707.98 | 7700.00 |
| VIX | 15.94 | 16.00 |
| 10Y Treasury Yield | 4.70% | 4.50% |
| WTI Crude Oil | $86.76 | $85.00 |
| US Dollar Index (DXY) | 98.75 | 98.50 |
The most dramatic score change of the day was observed in Tempus AI (TEM), whose directional pressure score escalated by 20 points to a strong bullish 71.0. This significant upward revision was primarily attributed to the Options Flow Intelligence dimension. Haruspex detected substantial bullish sentiment in TEM options, indicated by a put/call ratio of 0.14. Notably, unusual call activity at the $60 strike, involving 13,204 contracts, provided a clear bullish signal. This suggests a concentrated bet on future price appreciation for the AI-sector company.
Toll Brothers, Inc. (TOL) also registered a notable shift, with its score climbing 19 points to a bullish 64.0. The primary driver for TOL was the Market Microstructure dimension, which detected strong buying pressure. The data showed 85% buy flow on 228% above-average trading volume, signaling robust demand for the stock. Such concentrated buying often precedes continued upward movement.
Carvana Co. (CVNA) experienced a 17-point score increase, pushing its directional pressure score to a bullish 60.0. Similar to TOL, the Market Microstructure dimension was the key factor. Haruspex identified 75% buy flow for CVNA, coupled with excellent liquidity and tight spreads. This indicates consistent buying interest without significant price disruption, a healthy sign for short-term momentum.
Sprott Physical Silver Trust (PSLV) saw its score rise by 15 points to 68.0, indicating bullish pressure. The Market Microstructure dimension highlighted strong buying pressure, with 72% buy flow and strong liquidity. This suggests renewed interest in silver, potentially driven by broader economic factors or a flight to safe-haven assets.
APi Group Corporation (APG) showed a 14-point jump, bringing its score to a bullish 67.0. This move was propelled by the Institutional Ownership Intelligence dimension. Haruspex identified significant net institutional buying, with APG boasting 86.9% institutional ownership across 763 institutions. This accumulation by large players often provides a strong foundation for price stability and potential appreciation.
Finally, Snap Inc. (SNAP) also saw its score increase by 14 points, reaching a bullish 67.0. The Market Microstructure dimension detected buying pressure, with 63% buy flow and excellent liquidity. While less intense than some other movers, this still represents a notable shift in short-term trading dynamics for the social media platform.
Why do large score swings matter for investors?
Haruspex scores represent detected market directional pressure, not company quality ratings. Scores above 70 indicate strong bullish pressure, while 60-69 suggests bullish pressure. Sudden, significant score changes, like those seen today, reflect abrupt shifts in short-term market dynamics, often preceding notable price moves. These shifts can highlight opportunities where conventional single-factor screens might miss the nuanced interplay of market forces.
Regime Thresholds
The current bullish momentum thesis holds within the prevailing macro conditions. A VIX sustained below 16.00 and the S&P 500 above 7700.00 [data: 2026-08-20 close] generally support risk-on sentiment, which can amplify individual stock momentum. A significant rise in WTI Crude Oil above $90 per barrel could introduce inflationary pressures, potentially affecting consumer-sensitive stocks like CVNA or TOL.
Contrarian View: Could Momentum Reverse?
While these strong directional signals suggest bullish pressure, short-term momentum can reverse quickly. Profit-taking, especially after rapid gains, is a common occurrence. For stocks driven by market microstructure, a sudden influx of selling pressure or a decline in trading volume could quickly dissipate the observed buying flow. Similarly, options activity can be volatile, and large call positions might be unwound rapidly.
What Would Change This View
- For Tempus AI (TEM): A significant increase in the put/call ratio above 0.50, or a dramatic decrease in the open interest at the $60 call strike, would invalidate the current options-driven bullish pressure.
- For Toll Brothers (TOL), Carvana (CVNA), Sprott Physical Silver Trust (PSLV), and Snap Inc. (SNAP): A sustained shift from net buy flow to net sell flow in their respective Market Microstructure data, particularly if accompanied by high trading volume, would negate the bullish pressure.
- For APi Group Corporation (APG): A reversal to net institutional selling or a public disclosure of significant insider selling, would diminish the institutional support signal.
Action Items: What to Watch Next
Investors tracking these movers should monitor follow-through volume and order flow closely. For TEM, observing whether the $60 calls attract more activity or if underlying stock price moves in alignment with the options sentiment is key. For stocks showing strong buying pressure, sustained above-average volume with continued buy flow indicates potential for further upside. Any reversal in these specific dimension signals would warrant re-evaluation of the bullish outlook.
