Bid-Ask Spread Percent

Definition

Spread, one of the most common measures of liquidity and transaction costs, is the difference between the price that buyers are bidding at and the price that sellers are asking for. A large spread indicates disagreement between market participants on price and lends to inefficiencies in the market.

Name	MetricID	Unit	Interval
Bid-Ask Spread, Mean, Percent, 1 Minute	liquidity_bid_ask_spread_percent_1m	Dimensionless	1m
Bid-Ask Spread, Mean, Percent, 1 Hour	liquidity_bid_ask_spread_percent_1h	Dimensionless	1h
Bid-Ask Spread, Mean, Percent, 1 Day	liquidity_bid_ask_spread_percent_1d	Dimensionless	1d

Details

Spread is normally calculated using the prices listed at the top of the book— that is, comparing the highest bidding price and the lowest asking price. There are many variations on spread in the literature, such as an effective spread that only uses market candle data and taking into account a degree of orderbook depth. However, here we stick to the classical formulation of spread.

Spread, the difference between the quote asset’s ask and bid price, can be presented raw or as a percentage of a reference price. Typically this reference price is the midpoint between the bid and asking price. Here we represent it as a percentage of the mid price.

We offer the bid-ask spread over 1m, 1h, and 1d intervals. Each of these metrics represents the average bid-ask spread over the interval of time.

API Endpoints

Liquidity bid-ask spread metrics can be accessed using the following endpoints:

• timeseries/market-metrics

Market metrics

get

Returns metrics for specified markets. Results are ordered by tuple (market, time). To fetch the next page of results use next_page_url JSON response field.

Authorizations

Query parameters

marketsstring[]Required

Comma separated list of markets or market patterns like exchange-* or exchange-*-spot or *USDT-future. Use the /catalog-all/markets endpoint for the full list of supported markets.

metricsstring[]Required

Comma separated metrics to request time series data for. Use the /catalog-all/market-metrics endpoint for the full list of supported metrics per exchange-asset combination.

Example: ["liquidations_reported_future_buy_units_1d","liquidations_reported_future_sell_units_1d"]

frequencystringOptional

Frequency of the market metrics. Supported values are 1m, 5m, 1h, 1d.

Default: 1d

start_timestringOptional

Start of the time interval. This field refers to the time field in the response. Multiple formats of ISO 8601 are supported: 2006-01-20T00:00:00Z, 2006-01-20T00:00:00.000Z, 2006-01-20T00:00:00.123456Z, 2006-01-20T00:00:00.123456789Z, 2006-01-20, 20060120. Inclusive by default. UTC timezone by default. Z suffix is optional and timezone parameter has a priority over it. If start_time is omitted, response will include time series from the earliest time available.

end_timestringOptional

End of the time interval. This field refers to the time field in the response. Multiple formats of ISO 8601 are supported: 2006-01-20T00:00:00Z, 2006-01-20T00:00:00.000Z, 2006-01-20T00:00:00.123456Z, 2006-01-20T00:00:00.123456789Z, 2006-01-20, 20060120. Inclusive by default. UTC timezone by default. Z suffix is optional and timezone parameter has a priority over it. If end_time is omitted, response will include time series up to the latest time available.

start_inclusivebooleanOptional

Inclusive or exclusive corresponding start_* parameters.

Default: true

end_inclusivebooleanOptional

Inclusive or exclusive corresponding end_* parameters.

Default: true

timezonestringOptional

Timezone name for start_time and end_time timestamps. This parameter does not modify the output times, which are always UTC. Format is defined by TZ database.

Default: UTCExample: America/New_York

page_sizeinteger · int32 · min: 1 · max: 10000Optional

Number of items per single page of results. The value of this parameter is ignored if the endpoint supports the format parameter and its value is set to json_stream.

Default: 100

paging_fromstring · enumOptional

Where does the first page start, at the start of the interval or at the end. The value of this parameter is ignored if the endpoint supports the format parameter and its value is set to json_stream.

Default: endPossible values:

sortstring · enumOptional

How results will be sorted. Metrics are sorted by (market, time) by default. If you want to sort 1d metrics by (time, market) you should choose time as value for the sort parameter. Sorting by time is useful if you request metrics for a set of markets.

Default: marketPossible values:

limit_per_marketinteger · int32Optional

How many entries per market result should contain. It is useful when multiple markets are requested.

prettybooleanOptional

Human-readable formatting of JSON responses.

Default: false

formatstring · enumOptional

Format of the response.

Default: jsonPossible values:

next_page_tokenstringOptional

Token for receiving the results from the next page of a query. Should not be used directly. To iterate through pages just use next_page_url response field.

Responses

200

Time series of market metrics.

application/json

400

Market not found.

application/json

401

Requested resource requires authorization.

application/json

403

Requested resource is not available with supplied credentials.

application/json

414

Provided URI is too long. It must not be greater than 10000 symbols.

get

HTTPcURLJavaScriptPython

GET /v4/timeseries/market-metrics HTTP/1.1
Host: api.coinmetrics.io
Accept: */*

{
  "data": [
    {
      "market": "binance-BTCUSDT-future",
      "time": "2022-01-19T20:00:00.000000000Z",
      "liquidations_reported_future_buy_usd_5m": "1298.36866"
    },
    {
      "market": "binance-BTCUSDT-future",
      "time": "2022-01-19T20:10:00.000000000Z",
      "liquidations_reported_future_buy_usd_5m": "39713.60016"
    },
    {
      "market": "binance-BTCUSDT-future",
      "time": "2022-01-19T20:30:00.000000000Z",
      "liquidations_reported_future_buy_usd_5m": "29084.10932"
    },
    {
      "market": "binance-BTCUSDT-future",
      "time": "2022-01-19T21:00:00.000000000Z",
      "liquidations_reported_future_buy_usd_5m": "46294.99528"
    }
  ]
}

Shell

curl --compressed "https://api.coinmetrics.io/v4/timeseries/market-metrics?markets=coinbase-btc-usd-spot&metrics=liquidity_bid_ask_spread_percent_1h&frequency=1h&limit_per_market=1&api_key=<your_key>"

Python

import requests
response = requests.get('https://api.coinmetrics.io/v4/timeseries/market-metrics?markets=coinbase-btc-usd-spot&metrics=liquidity_bid_ask_spread_percent_1h&frequency=1h&limit_per_market=1&api_key=<your_key>').json()
print(response)

Python Client

from coinmetrics.api_client import CoinMetricsClient

api_key = "<API_KEY>"
client = CoinMetricsClient(api_key)

print(
    client.get_market_metrics(
        markets=["coinbase-btc-usd-spot"], metrics=['liquidity_bid_ask_spread_percent_1h'], frequency='1h', limit_per_market=1
    ).to_dataframe()
)

Examples

A sample of the daily bid-ask spread for the coinbase-btc-usd-spot market is shown below:

{
  "data": [
    {
      "market": "coinbase-btc-usd-spot",
      "time": "2023-04-30T00:00:00.000000000Z",
      "liquidity_bid_ask_spread_percent_1d": "0.00581714797972098"
    },
    {
      "market": "coinbase-btc-usd-spot",
      "time": "2023-05-01T00:00:00.000000000Z",
      "liquidity_bid_ask_spread_percent_1d": "0.007762221844825188"
    },
    {
      "market": "coinbase-btc-usd-spot",
      "time": "2023-05-02T00:00:00.000000000Z",
      "liquidity_bid_ask_spread_percent_1d": "0.007638642427878028"
    },
    {
      "market": "coinbase-btc-usd-spot",
      "time": "2023-05-03T00:00:00.000000000Z",
      "liquidity_bid_ask_spread_percent_1d": "0.008122796665005141"
    },
    {
      "market": "coinbase-btc-usd-spot",
      "time": "2023-05-04T00:00:00.000000000Z",
      "liquidity_bid_ask_spread_percent_1d": "0.007612002413638571"
    }
  ]
}

• market: The IDs of the market.

• time: The time in ISO 8601 date-time format.

• liquidity_bid_ask_spread_percent_1d: The daily average spread between the bid-ask price, represented as a percentage of the mid price.

Frequenty Asked Questions

What units are the bid-ask spread metrics in?

The values are in percent units. For example, if the value is 0.0076, it should be interpreted as 0.0076%.

Release History

• Release Version. Market Data Feed v2.8 on May 2023.