Week of 16 Oct to 23 Oct 2026: biggest score moves in the S&P 100 and Nifty 50
Quantooo Lab ยท 2026-10-24
Every week we look back at how the scores moved. Each score summarises five parts of a stock's data (trend, stability, fundamentals, market backdrop and news tone; four parts for India) compared with the other stocks that day. A big change means the data changed, not that the price will follow. Our own tests found the scores have no reliable ability to rank stocks by future returns.
US (S&P 100): which scores rose most this week?
Change in score from 16 Oct to 23 Oct, out of 99 large US companies. The last column names the part of the score that moved most (percentile points).
| Stock | Score now | Change over the week | Biggest change in its parts |
|---|---|---|---|
| DOW Dow Inc. | 65 | +20.8 | news tone +77 |
| EXC Exelon Corp | 54 | +15.6 | stability +59 |
| UNP Union Pacific Corp | 66 | +14.2 | news tone +64 |
| ABBV AbbVie Inc. | 62 | +14.0 | news tone +47 |
| TXN Texas Instruments Inc | 68 | +12.0 | news tone +48 |
US (S&P 100): which scores fell most this week?
The biggest falls over the same days.
| Stock | Score now | Change over the week | Biggest change in its parts |
|---|---|---|---|
| MET Metlife Inc | 48 | -18.3 | stability -80 |
| SLB Slb Limited | 37 | -16.1 | news tone -45 |
| CL Colgate Palmolive Co | 41 | -14.3 | stability -79 |
| AXP American Express Co | 40 | -13.3 | stability -29 |
| SO Southern Co | 45 | -12.9 | news tone -60 |
Market backdrop, US: 46 out of 100, from 50 a week earlier, so conditions looked more stressed. 50 is a typical day; the backdrop is the same for every stock in a market.
How are the US (S&P 100) live portfolios doing?
Hypothetical paper portfolios that trade weekly on scores published before the market opened. Not real money and not a claim of returns.
| Portfolio | Return since the live run started |
|---|---|
| Long-short (top vs bottom 10%) | +0.87% |
| Long-only top 10 | +1.72% |
| Risk-managed S&P 500 | -1.07% |
| Random long-short (benchmark) | -0.71% |
| S&P 500 buy-and-hold (benchmark) | -1.00% |
| Equal-weight (benchmark) | +0.89% |
India (Nifty 50): which scores rose most this week?
Change in score from 15 Oct to 23 Oct, out of the 50 Nifty 50 companies. The last column names the part of the score that moved most (percentile points).
| Stock | Score now | Change over the week | Biggest change in its parts |
|---|---|---|---|
| SBILIFE SBI Life Insurance Company Ltd. | 54 | +12.6 | stability +52 |
| M&M Mahindra & Mahindra Ltd. | 54 | +11.6 | stability +40 |
| LT Larsen & Toubro Ltd. | 50 | +7.1 | stability +24 |
| DRREDDY Dr. Reddy's Laboratories Ltd. | 39 | +7.0 | fundamentals +19 |
| RELIANCE Reliance Industries Ltd. | 44 | +5.7 | stability +26 |
India (Nifty 50): which scores fell most this week?
The biggest falls over the same days.
| Stock | Score now | Change over the week | Biggest change in its parts |
|---|---|---|---|
| TECHM Tech Mahindra Ltd. | 45 | -10.8 | stability -34 |
| TATASTEEL Tata Steel Ltd. | 47 | -9.2 | stability -22 |
| JIOFIN Jio Financial Services Ltd. | 38 | -9.0 | stability -22 |
| TRENT Trent Ltd. | 44 | -7.3 | trend -14 |
| BAJFINANCE Bajaj Finance Ltd. | 51 | -6.7 | stability -12 |
Market backdrop, India: 36 out of 100, from 43 a week earlier, so conditions looked more stressed. 50 is a typical day; the backdrop is the same for every stock in a market.
How are the India (Nifty 50) live portfolios doing?
Hypothetical paper portfolios that trade weekly on scores published before the market opened. Not real money and not a claim of returns.
| Portfolio | Return since the live run started |
|---|---|
| Long-short (top vs bottom 10%) | -1.37% |
| Long-only top 10 | -3.20% |
| Random long-short (benchmark) | +0.34% |
| Nifty 50 buy-and-hold (benchmark) | -1.86% |
| Equal-weight (benchmark) | -2.17% |
Do the biggest score rises tell you which stocks will go up?
No. A rising score means a stock's recent data looks better than before compared with its peers. In our tests, rankings like these did not reliably predict next-month returns, and on the final test year the score was slightly backwards. Read these lists as a summary of what changed in the data this week.
Every stock page shows the full calculation, and the live portfolios show how rule-based portfolios built on these scores are doing against their benchmarks, week by week.