S5/10Economic

Sell in May Proves to Be a Losing Trade in US Stocks

S&P 500 set to gain for a ninth straight week as AI trade powers on.

29 May 2026, 10:17 UTCSource: Bloomberg Markets
⚠️ This is a probabilistic forecast, not a guarantee. Accuracy is measured only on resolved scenarios; monitor confirmation indicators below.
A
Escalation26% model probability

Confirmation indicators

  • 1) Continued upward trend of the AI
  • related index (e.g., Nasdaq AI Index). 2) Significant increase in trading volume on major stock exchanges.
Horizon: 21–42 days
B
Status quo54% model probability

Confirmation indicators

  • 1) Continued upward trend of the AI
  • related index (e.g., Nasdaq AI Index). 2) Significant increase in trading volume on major stock exchanges.
Horizon: 21–42 days
C
De-escalation20% model probability

Confirmation indicators

  • 1) Continued upward trend of the AI
  • related index (e.g., Nasdaq AI Index). 2) Significant increase in trading volume on major stock exchanges.
Horizon: 21–42 days