Liquidity
Measure how liquid every fund is to trade over the last year of the period: its average daily volume and dollar volume, that dollar volume relative to the fund’s assets under management, and the price impact of trading 100 million dollars in a day (the Amihud, 2002, illiquidity: the average absolute daily return per dollar traded, scaled to 100 million). An ETF can also be traded through its holdings, so a thinly traded fund of liquid holdings is easier to trade than its own volume suggests; a fund whose holdings are themselves illiquid (small companies, high yield bonds) is not.
For more information, see the following paper:
- Amihud, Y. (2002). “Illiquidity and Stock
Returns: Cross-Section and Time-Series Effects.” Journal of Financial Markets, 5(1), 31-56.
Also known as: ETF liquidity, dollar volume, Amihud illiquidity, price impact.
Liquidity in Python or via the MCP
Install the Finance Toolkit with:
pip install financetoolkit -U
Then call get_liquidity as shown below.
from financetoolkit import Toolkit
toolkit = Toolkit(
["VOO", "QQQ", "ARKK"],
api_key="FINANCIAL_MODELING_PREP_KEY",
start_date="2025-01-01",
end_date="2025-12-31",
)
toolkit.etf.get_liquidity(rounding=6)
Or, after setting up the Finance Toolkit MCP, ask:
How liquid were VOO, QQQ and ARKK in 2025: average volume, dollar volume, dollar volume to assets and the price impact per $100 million traded?
Which returns:
| VOO | QQQ | ARKK | |
|---|---|---|---|
| Average Volume | 7734399.056000 | 48666218.588000 | 10799597.760000 |
| Average Dollar Volume | 4400329488.944520 | 26740006060.354679 | 719035298.234000 |
| Dollar Volume to Assets | 0.002588 | 0.056270 | 0.090822 |
| Price Impact per $100 Million | 0.000179 | 0.000036 | 0.002990 |
Parameters
get_liquidity accepts the following parameters.
| Parameter | Type | Description | Example |
|---|---|---|---|
rounding | int | None | The number of decimals to round the results to. Defaults to None, which keeps the full precision (the price impact of the largest funds is a fraction of a basis point). | 2 |