Long-short diary, 30 Oct: US −0.59% · India −0.85% today
Quantooo Lab · 2026-10-30
What is this?
A simple rule picks stocks with our scores once a week. It owns the highest-scored stocks and bets against the lowest-scored ones. A bet against a stock gains when its price falls. It is paper money: nothing real is at stake.
US (S&P 100), close of 29 Oct
The rule owns the 10 highest-scored stocks and bets against the 10 lowest-scored.
| Today | Since start (19 Oct) | |
|---|---|---|
| Long-short (paper) | −0.59% | +1.42% |
| S&P 500 (index) | −0.38% | +0.23% |
| Random picks, same rule | – | −2.11% |
Helped most so far: T (bet against, price −10.02%), TXN (owned, price +8.31%), BKNG (bet against, price −7.00%).
Hurt most so far: UPS (bet against, price +10.37%), MCD (bet against, price +6.47%), F (bet against, price +6.37%).
Every position and every change: US portfolios.
India (Nifty 50), close of 30 Oct
The rule owns the 5 highest-scored stocks and bets against the 5 lowest-scored.
| Today | Since start (21 Oct) | |
|---|---|---|
| Long-short (paper) | −0.85% | −0.54% |
| Nifty 50 (index) | +0.51% | +0.11% |
| Random picks, same rule | – | +1.09% |
Helped most so far: ADANIPORTS (owned, price +4.64%), TMPV (bet against, price −4.53%), BSE (owned, price +4.48%).
Hurt most so far: NESTLEIND (owned, price −6.09%), COALINDIA (owned, price −5.51%), ADANIENT (owned, price −3.54%).
Every position and every change: India portfolios.
What does it mean?
A few days or weeks is far too short to judge a rule like this. Our research found the scores have not reliably picked winners, so we expect this to drift around zero over time. We publish it every day, good or bad, so anyone can watch the test as it happens.
Hypothetical paper portfolio, not real money and not a claim of returns. Educational, not investment advice.