Indices Intelligence: Deconstruct the Benchmark
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Go beyond the index value. Analyze real-time and historical constituent data, weight changes, sector rotations, and performance attribution for 50,000+ global indices and benchmarks.
Indices Intelligence: Deconstruct the Benchmark
Go beyond the index value. Analyze real-time and historical constituent data, weight changes, sector rotations, and performance attribution for 50,000+ global indices and benchmarks.
Weight Drift
Sector Exposure
Sector Rotation
Attribution
from axion import Axion, utils
client = Axion(api_key="your_api_key")
etf = "QQQ"
# Snapshot today's constituent weights, cached to disk
today = utils.df(utils.cache(
f"{etf}_holdings_{utils.d(utils.today)}",
lambda: client.etfs.holdings(etf)
))
# Yesterday's snapshot for comparison
prior = utils.df(utils.read(f"{etf}_holdings_{utils.d(utils.yesterday)}"))
# Align side by side and measure the change
merged = utils.snap(
[today, prior],
names=["now", "prior"],
overwrite=["holdingPercent"],
col="symbol"
)
merged["weight_change"] = merged["now"] - merged["prior_holdingPercent"]
merged.sort_values("weight_change", ascending=False).head(5)Powering financial research at
Index Intelligence. Global benchmark indices, historical data, and analytics.
FIG 0.1
Real-Time Levels
Live index values, daily changes, and historical price series for 50,000+ global benchmarks. Access real-time and delayed data via REST or WebSocket.
FIG 0.2
Historical Data
40+ years of daily index price history. Full backtesting of index-linked strategies with accurate corporate action adjustments.
FIG 0.3
Constituents & Weights
Complete constituent lists with market cap, weightings, and inclusion dates. Drill into sector breakdowns and security-level index composition.
FIG 0.4
Rebalancing Calendar
Scheduled rebalancing dates, methodology changes, and index reconstitution events. Stay ahead of index-driven flows and sector rotations.
FIG 0.5
Performance Attribution
Decompose index returns by sector, country, factor, and individual stock contribution. Identify the true drivers of benchmark outperformance.
FIG 0.6
Custom Index Creation
Build, backtest, and monitor custom baskets or thematic indices. Model bespoke benchmarks with the same rigor as major index providers.
Indices Data Platform
Fifty thousand indices.
Zero blind spots.
Real-time index values, full constituent and weight history, and performance attribution for 50,000+ global benchmarks. From real-time to daily frequency, across equities, fixed income, commodities, and custom sectors.
50,000+Indices Tracked
8+Asset Classes
40+yrHistory
100%Daily Updates
50,000+
Indices Tracked
100%
Daily Constituent Updates
Real-time to Daily
Calculation Frequencies
Analyze What Moves the Market
Full Constituent & Weight History
Access the complete historical record of index membership, weightings, and corporate actions. Perfect for accurate backtesting, benchmarking, and understanding index-driven flows.
Explore index constituents Performance & Attribution Analytics
Decompose index returns by sector, country, factor, and single-stock contribution. Identify what's truly driving benchmark performance versus your portfolio.
View attribution tools Custom Index & Basket Creation
Build, backtest, and monitor custom baskets or thematic indices using our universal securities master. Model bespoke benchmarks with the same rigor as major providers.
Build a custom index Global market index coverage
Structured index reference and historical pricing data across major exchanges, benchmarks, and sectors
Response200 OK•SPX
Comprehensive Index Coverage
Track major benchmark indices, sector indices, and custom factor-based indices with complete transparency into constituent lists, weightings, methodology documents, and rebalancing schedules. Build, backtest, and monitor custom baskets with full constituent and weight history.
Get API AccessGlobal indices
Live regional benchmarks
S&P 500
5,918
+0.74%Nasdaq 100
21,410
+1.12%Dow Jones
43,280
-0.18%Russell 2000
2,284
+0.42%FTSE 100
8,214
+0.31%Nikkei 225
39,150
-0.55%We track over 5,000 indices
You can monitor benchmark, sector, and custom indices across every global market.
S&P 500 · SECTORS
Leadership mosaic
Technology +1.8%
Utilities -0.6%
We cover 8+ asset classes
You can access indices spanning equities, fixed income, commodities, and more.
MARKET-CAP WEIGHT
Concentration risk
63
risk score
Top 10 companies
34.8%
+6.2 pts vs 10Y median
Effective names
128
Herfindahl index
0.041
We provide 40+ years of history
You can backtest with full constituent and weight history for robust index analysis.
12 Index funds
7 Equity
3 International
2 Bond
Allocation drift
+3.4%
Above target mix
-10%Target+10%
portfolio score
82/100
Well diversified
050100
Your portfolio review
Jul 16, 2026We flagged 2 holdings that may be quietly costing you. Here is what we observed:
Elevated fund fees
Two funds carry expense ratios well above their category average:
Actively Managed Growth
U.S. large cap
High fee
0.73% exp.
Legacy Mutual Fund
U.S. large cap
Index overlap
0.68% exp.
Total Market Index Fund
On trackYTD return
+12.4%
Expense ratio
0.03%
Data source
Marketclose
We update constituents daily
You always have the latest index compositions with full corporate action adjustments.
CORE US LARGE CAP
Vehicle fit comparison
Measure
IVV
ETF
Index
Direct basket
Expense ratio
0.03%
0.20%
Median spread
1 bp
4 bps
Tracking error
6 bps
31 bps
Daily liquidity
$34B
$1.8B
Exposure overlap
98.7%
Implementation score
92 / 100We cover every rebalancing event
You get complete rebalancing schedules, methodology documents, and full transparency.
Index Intelligence that powers your workflow.
0,000+
0+ yr
0%
Pricing That Scales With You
Flexible plans for developers, startups, and enterprises. Access comprehensive financial data through a single, reliable API.
Free
Starter
Pro
Enterprise
Pricing
API Limits
Historical Data
Data Access
Free
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Monthly price
Free
Annual price
Free
API Limits
Monthly API calls
1,000
Historical Data
Record availability
1 Year
Data Access
Stocks
ETFs
Forex
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Indices
Crypto
Corporate Intelligence
Earnings
Filings & Financials
Economic Data
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Credit Ratings
ESG Rankings
Supply Chain
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Pricing
Monthly price
$49.99/mo
Annual price
$39.99/mo
Billed annually
Billed annually
API Limits
Monthly API calls
50,000
Historical Data
Record availability
25 Years
Data Access
Stocks
ETFs
Forex
Futures
Indices
Crypto
Corporate Intelligence
Earnings
Filings & Financials
Economic Data
News
Credit Ratings
ESG Rankings
Supply Chain
Sentiment Analysis
Web Traffic
Pro
Pricing
Monthly price
$199.99/mo
Annual price
$159.99/mo
Billed annually
Billed annually
API Limits
Monthly API calls
1,000,000
Historical Data
Record availability
+50 (unlimited)
Data Access
Stocks
ETFs
Forex
Futures
Indices
Crypto
Corporate Intelligence
Earnings
Filings & Financials
Economic Data
News
Credit Ratings
ESG Rankings
Supply Chain
Sentiment Analysis
Web Traffic
Enterprise
Pricing
Monthly price
Custom
Annual price
Custom
API Limits
Monthly API calls
Unlimited
Historical Data
Record availability
Unlimited
Data Access
Stocks
ETFs
Forex
Futures
Indices
Crypto
Corporate Intelligence
Earnings
Filings & Financials
Economic Data
News
Credit Ratings
ESG Rankings
Supply Chain
Sentiment Analysis
Web Traffic
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