How is Upbit's contract funding rate calculated?

Upbit's funding rate, calculated every 8 hours, impacts traders' profitability by aligning futures prices with spot prices, using a formula involving Premium Index and Interest Rate.

Apr 13, 2025 at 10:15 am

Introduction to Upbit's Contract Funding Rate

Upbit, one of the leading cryptocurrency exchanges in South Korea, offers various trading products including futures contracts. A critical aspect of trading futures on Upbit is understanding the funding rate, which is a mechanism designed to ensure that the futures prices converge with the spot prices over time. The funding rate plays a significant role in maintaining market stability and can impact traders' profitability. In this article, we will delve into how Upbit calculates its contract funding rate and explore the various factors that influence it.

What is the Funding Rate?

The funding rate is a periodic payment made between traders based on the difference between the perpetual contract's market price and the spot price. If the funding rate is positive, long position holders pay short position holders, and if it's negative, short position holders pay long position holders. This mechanism helps align the futures market price with the underlying asset's spot price.

Calculation of Upbit's Funding Rate

Upbit calculates the funding rate based on a formula that takes into account the difference between the perpetual contract's market price and the spot price. The funding rate is calculated as follows:

[ \text{Funding Rate} = \text{Premium Index} + \text{Clamp}(\text{Interest Rate} - \text{Premium Index}, -0.05\%, 0.05\%) ]

Here, the Premium Index is the average of the difference between the perpetual contract's market price and the spot price over a certain period. The Interest Rate is a reference rate that reflects the cost of capital, typically based on a widely recognized benchmark like the LIBOR or another similar rate.

Components of the Funding Rate Calculation

Premium Index

The Premium Index is a crucial component of the funding rate calculation. It is computed as the time-weighted average of the difference between the perpetual contract's market price and the spot price over a specific period, typically every 8 hours. Upbit uses the following formula to calculate the Premium Index:

[ \text{Premium Index} = \frac{\sum (\text{Perpetual Contract Price} - \text{Spot Price}) \times \text{Time Weight}}{\sum \text{Time Weight}} ]

This ensures that the Premium Index reflects the average premium or discount of the perpetual contract over the spot price.

Interest Rate

The Interest Rate component in the funding rate formula represents the cost of capital. Upbit typically uses a widely recognized benchmark rate, such as the LIBOR, to determine this value. The Interest Rate is adjusted periodically to reflect changes in the broader financial market.

Clamp Function

The Clamp Function in the funding rate formula ensures that the difference between the Interest Rate and the Premium Index is constrained within a certain range, typically between -0.05% and 0.05%. This prevents extreme fluctuations in the funding rate and helps maintain market stability.

Frequency of Funding Rate Adjustments

Upbit adjusts the funding rate every 8 hours. This means that traders need to be aware of the funding rate at three key times each day: 00:00 UTC, 08:00 UTC, and 16:00 UTC. At these times, the funding rate is recalculated, and any payments due are settled between long and short position holders.

Impact of the Funding Rate on Traders

The funding rate can have a significant impact on traders' profitability. For instance, if the funding rate is consistently positive, holding a long position becomes more expensive over time, as long position holders need to pay short position holders. Conversely, if the funding rate is negative, holding a short position becomes more costly.

Traders need to monitor the funding rate closely and adjust their trading strategies accordingly. For example, if the funding rate is high and a trader expects it to remain high, they might consider closing long positions or opening short positions to benefit from the funding payments.

Practical Example of Funding Rate Calculation

To illustrate how Upbit calculates the funding rate, let's consider a hypothetical scenario:

• Perpetual Contract Price: $10,000
• Spot Price: $9,950
• Interest Rate: 0.1%
• Premium Index: Calculated as the average difference between the Perpetual Contract Price and the Spot Price over the last 8 hours, let's assume it is 0.2%.

Using the funding rate formula:

[ \text{Funding Rate} = 0.2\% + \text{Clamp}(0.1\% - 0.2\%, -0.05\%, 0.05\%) ]

[ \text{Funding Rate} = 0.2\% + \text{Clamp}(-0.1\%, -0.05\%, 0.05\%) ]

[ \text{Funding Rate} = 0.2\% - 0.05\% ]

[ \text{Funding Rate} = 0.15\% ]

In this example, the funding rate is 0.15%. If a trader holds a long position, they will pay 0.15% of their position value to short position holders every 8 hours.

How to Monitor the Funding Rate on Upbit

To effectively trade futures on Upbit, it's essential to monitor the funding rate. Here are the steps to do so:

• Log into your Upbit account.
• Navigate to the futures trading section.
• Select the specific futures contract you are interested in.
• Look for the funding rate information, usually displayed prominently on the trading interface.

Upbit provides real-time updates on the funding rate, allowing traders to make informed decisions based on the latest data.

Frequently Asked Questions

Q: How often does Upbit adjust the funding rate?

A: Upbit adjusts the funding rate every 8 hours, specifically at 00:00 UTC, 08:00 UTC, and 16:00 UTC.

Q: What happens if the funding rate is consistently high?

A: If the funding rate is consistently high, it becomes more expensive to hold long positions. Traders might consider closing long positions or opening short positions to benefit from the funding payments.

Q: Can the funding rate be negative?

A: Yes, the funding rate can be negative. When it is negative, short position holders pay long position holders.

Q: How does Upbit determine the Interest Rate used in the funding rate calculation?

A: Upbit typically uses a widely recognized benchmark rate, such as the LIBOR, to determine the Interest Rate. This rate is adjusted periodically to reflect changes in the broader financial market.