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Annualized Funding Rate (OI-Weighted)

OI-weighted average annualized funding rate across 7 exchanges

PropertyValue
CategoryMarket Data
Unit%
Resolution1d
AssetsBTC
TierBasic
API EndpointGET /v1/funding/aggregate
Fieldavg_funding_rate

Overview​

Annualized Funding Rate (OI-Weighted) is the cross-exchange average perpetual futures funding rate, weighted by each exchange's open interest. It aggregates data from 7 major venues: Binance, Bybit, OKX, Deribit, Bitget, Gate.io, and Hyperliquid.

History of Perpetual Funding Rates​

The concept of perpetual futures originates from economist Robert Shiller's 1993 paper proposing perpetual claims on illiquid assets. However, it was BitMEX that pioneered crypto perpetual swaps in May 2016, introducing the funding rate mechanism to anchor the perpetual contract price to the spot market without expiry dates. The innovation solved a fundamental problem: traditional futures converge to spot at expiry, but perpetuals never expire — so funding rates act as the convergence mechanism.

By 2019–2020, every major exchange had adopted the model. Today, perpetual futures account for over 90% of crypto derivatives volume globally, and the aggregate funding rate is one of the most-watched sentiment indicators in the market.

Interpretation​

The funding rate is a periodic payment exchanged between long and short traders in perpetual futures markets:

  • Positive rate: Longs pay shorts — bullish leverage dominates. The perpetual contract trades at a premium to spot, and longs effectively pay a cost for maintaining their exposure.
  • Negative rate: Shorts pay longs — bearish sentiment prevails. The contract trades at a discount to spot.
  • Near zero: Market is balanced between longs and shorts, with the perpetual price tracking spot closely.

OI-weighting means exchanges with larger open interest (more capital at stake) have proportionally more influence on the aggregate rate. This prevents small, illiquid venues from distorting the signal.

Extreme values (annualized >50% or <−50%) historically precede liquidation cascades: overleveraged longs at extreme positive funding often get squeezed on a dip, and vice versa.

Use Cases​

  • Sentiment gauge: The most direct measure of leveraged trader positioning across the market. Positive = bullish crowd consensus, negative = bearish.
  • Contrarian signal: Persistently extreme positive funding (>30% annualized) often precedes corrections — the market is "too long." Extreme negative funding can signal capitulation and a local bottom.
  • Cost of carry: For arbitrageurs, the funding rate represents the yield from basis trades (long spot + short perp). Sustained high positive funding creates a risk-free carry opportunity.
  • Cross-exchange comparison: Compare the aggregate rate with individual exchange rates to identify outliers and arbitrage opportunities.

Data Source​

Aggregated from 8-hourly funding snapshots across all tracked exchanges. Hyperliquid reports hourly rates which are normalized to 8-hour equivalents. The aggregate is OI-weighted: each exchange's contribution is proportional to its BTC perpetual open interest at the time of the snapshot.

API Usage​

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.blocklens.co/v1/funding/aggregate?start_date=2024-01-01&end_date=2024-12-31&limit=365"