Stock Index API: Deconstruct the Benchmark

Name: Stock Index API – Global Market Indices Data
Creator: AxionQuant
License: https://axionquant.com/terms

Go beyond the index value. Analyze daily and historical market index data, constituent weights, sector rotations, and performance attribution for 50,000+ global indices and benchmarks.

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Weight Drift

Sector Exposure

Sector Rotation

Attribution

weight_drift.py

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

Stock Index API & Intelligence. Global market indices, historical data, and analytics.

FIG 0.1

Daily Levels & Deep History

Daily index values, daily changes, and full historical stock index data for 50,000+ global benchmarks. Access decades of daily and hourly history via a simple REST API.

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 data.

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 with the same rigor as major index providers. Model bespoke benchmarks across the global indices universe.

Indices Data Platform

Index data
across 50,000+ benchmarks.

Daily and hourly market index data, full constituent and weight history, and performance attribution for 50,000+ global benchmarks. Optimized for long-horizon research across equities, fixed income, commodities, and custom sectors.

50,000+Indices Tracked

8+Asset Classes

40+yrHistory

100%Daily Updates

FTSE 100

FTSE 250

DAX 40

CAC 40

Euro Stoxx 50

IBEX 35

FTSE MIB

AEX Amsterdam

BEL 20

Swiss Market Index

OMX Stockholm 30

OBX Oslo

Bovespa Brazil

MERVAL Argentina

IPSA Chile

JSE Top 40 South Africa

EGX 30 Egypt

TA-35 Israel

BIST 100 Turkey

COLCAP Colombia

MSCI World Index

MSCI Emerging Markets Index

S&P/BVL Peru

S&P 500 & Nasdaq-100

Dow Jones Industrial Average

Russell 2000

S&P/TSX Composite Canada

S&P/TSX 60 Canada

CBOE Volatility Index (VIX)

S&P/BMV IPC Mexico

Stock Index API: Deconstruct the Benchmark

Go beyond the index value. Analyze daily and historical market index data, constituent weights, sector rotations, and performance attribution for 50,000+ global indices and benchmarks.

50,000+

Indices Tracked

100%

Daily Constituent Updates

Daily & Hourly

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 data-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

[
  {
    "id": 75,
    "ticker": "AMZIVWAP",
    "name": "Alerian MLP Infrastructure Inde",
    "exchange": "NYS"
  },
  {
    "id": 79,
    "ticker": "AOR-IV",
    "name": "ISHARES CORE 60/40 BALANCED ALL",
    "exchange": "ASE"
  },
  {
    "id": 5,
    "ticker": "AXJO",
    "name": "S&P/ASX 200",
    "exchange": "ASX"
  },
  {
    "id": 6,
    "ticker": "ATX",
    "name": "ATX",
    "exchange": "VIE"
  },
  {
    "id": 8,
    "ticker": "ERAEMEUT",
    "name": "Enhanced RAFI Emerging Markets",
    "exchange": "SNP"
  }
]

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 Access

Global indices

Daily regional benchmarks

Markets open

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 50,000 indices

You can monitor benchmark, sector, and custom indices across every global market.

S&P 500 · SECTORS

Leadership mosaic

Broadening

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

Elevated

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, 2026

We 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 track

YTD 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

ETF wins

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 / 100

We cover every rebalancing event

You get complete rebalancing schedules, methodology documents, and full transparency.

0,000+

Indices Tracked.

Benchmarks spanning equities, fixed income, commodities, and custom sectors, updated daily.

0+ yr

Historical Depth.

Full constituent and weight history for robust backtesting and attribution.

Daily Updates.

Constituent changes, rebalancing events, and corporate actions refreshed every day.

Frequently Asked Questions

Which indices do you cover?

Benchmark indices across US and global markets are covered. The list endpoint enumerates every index, and find-tickers resolves indices by name or identifier.

Can I see the constituents of an index?

Yes, the components endpoint lists an index's constituent tickers, and the exposure endpoint summarises the index by factor and sector groupings.

Is index price history included?

Every index has quote and historical price endpoints, so benchmark-relative performance studies need only two calls per series.

How do indices relate to the ETFs data?

Index constituents pair naturally with ETF holdings: compare a fund's weights against its benchmark index directly inside your own analysis stack.

Pricing That Scales With You

Flexible plans for developers, startups, and enterprises. Access comprehensive market data, fundamental data, and alternative data through a single financial data API.

Free

Starter

Pro

Enterprise

Pricing

Monthly price

Free

$49.99/mo

$199.99/mo

Custom

Annual price

Free

$39.99/mo
Billed annually

$159.99/mo
Billed annually

Custom

API Limits

Monthly API calls

1,000

50,000

1,000,000

Unlimited

Historical Data

Record availability

1 Year

25 Years

+50 (unlimited)

Unlimited

Data Access

Corporate Intelligence

Free

Pricing

Monthly price

Free

Annual price

Free

API Limits

Monthly API calls

1,000

Historical Data

Record availability

1 Year

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

Starter

Pricing

Monthly price

$49.99/mo

Annual price

$39.99/mo
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

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

Start Building with the AxionQuant Financial Data API

Join thousands of developers and quants using AxionQuant to power financial applications with market data, fundamentals, and alternative data. Grab your free API key and start pulling stock market data in minutes.

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Stock Index API: Deconstruct the Benchmark

Stock Index API & Intelligence. Global market indices, historical data, and analytics.

Daily Levels & Deep History

Historical Data

Constituents & Weights

Rebalancing Calendar

Performance Attribution

Custom Index Creation

Index dataacross 50,000+ benchmarks.

Stock Index API: Deconstruct the Benchmark

Analyze What Moves the Market

Global market index coverage

Comprehensive Index Coverage

Global indices

We track over 50,000 indices

Leadership mosaic

We cover 8+ asset classes

Concentration risk

We provide 40+ years of history

12 Index funds

Allocation drift

portfolio score

Your portfolio review

Elevated fund fees

Total Market Index Fund

We update constituents daily

Vehicle fit comparison

We cover every rebalancing event

Stock index data that powers your workflow.

Frequently Asked Questions

Which indices do you cover?

Can I see the constituents of an index?

Is index price history included?

How do indices relate to the ETFs data?

Pricing That Scales With You

Start Building with the AxionQuant Financial Data API

Market Data

Alternative Data

Developers

Company

Reports

Legal

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Index data
across 50,000+ benchmarks.