Daily Report – 2026-05-19


S&P 500 Report

Top 10 Contributors


S&P 500: 7353.61 | 📉 Down (-0.67%)

Market Structure Score:

0/3
— Weak / Fragile Structure


🔁 Regime shift: Broad Bull → Weak / Risk-Off

Market Summary

▶ The market exhibited a broad-based structure.

▶ Primary leadership came from
LLY (3.37%), AAPL (0.38%), MU (2.52%), INTC (2.43%), XOM (1.28%).

▶ Participation deteriorated materially, consistent with broad risk reduction across the index. Leadership breadth improved, indicating a healthier distribution of flows across the market. Internal conditions reflected a more defensive tone, with participation weakening across a broad set of names.

▶ Advancers: 185 /
502
(
▲ 36.9%
)
while
315 declined
(
▼ 62.7%
).

(2 unchanged)

Signals: Leadership rotation increasing

Market Signals

▶ 🔄 Leadership rotation increasing

Top Contributors (>0.01%)

Ticker Return Contribution Share Impact_Efficiency Rank
LLY 3.37% 0.04% 2.72% 0.011033 1
AAPL 0.38% 0.02% 1.80% 0.064860 2
MU 2.52% 0.02% 1.76% 0.009542 3
INTC 2.43% 0.02% 1.29% 0.007274 4
XOM 1.28% 0.01% 0.99% 0.010572 5
ABBV 2.08% 0.01% 0.90% 0.005895 6
COST 1.66% 0.01% 0.88% 0.007252 7

Definitions:

Contribution – The weighted impact of a stock’s return on the overall index move
(weight × return). This reflects how much each stock actually moved the index.

Share – The proportion of total index movement attributable to a given stock.
Higher values indicate outsized influence relative to peers.

Impact Efficiency – The ratio of contribution to return, highlighting how effectively
a stock’s price move translates into index impact (primarily driven by index weight).


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