Recently, I’ve noticed many newcomers to crypto asking what funding is, so today I will share a detailed explanation of this mechanism.

Funding Rate is the periodic interest fee paid between traders who are long (buy) and short (sell). Its main purpose is to keep the futures contract price from diverging too far from the actual market price. It is calculated based on the difference between the Spot price and the Futures price, expressed as a percentage.

The mechanism is quite simple. When the funding rate is positive, meaning the Futures price is higher than the Spot, the Longs pay the Shorts. Conversely, when the funding rate is negative, meaning the Futures price is lower than the Spot, the Shorts pay the Longs. This operation makes funding a very effective tool for reflecting market sentiment.

Why is funding rate needed? It helps balance buyers and sellers, preventing traders from exploiting price discrepancies for profit. Additionally, it maintains liquidity and stability across the entire market. I also observe that the funding rate changes quite quickly and cannot be fully predicted.

Regarding the calculation, funding is determined through the Premium Index, Mark Price, and Funding Interval. The Premium Index compares the futures price with the market price, the Mark Price is the current contract price, the Fair Price is the theoretical price unaffected by funding, and the Funding Interval is usually about 8 hours. The simplest way to calculate is to multiply the open position volume by the funding rate.

I’ve tried making money from the funding rate by simultaneously buying Spot and opening a Short position with the same volume. For example, buying $20,000 worth of Bitcoin and Shorting $20,000 at the same time. If the funding rate is 0.01%, I receive $6 daily, which amounts to about $2,190 annually with an APR of approximately 10.95%. However, this method only works when the funding rate is positive, and since it changes frequently, it cannot be used continuously.

There are some risks to consider when working with funding rates. If you don’t understand the mechanism well, you could end up paying large fees. Some traders might intentionally manipulate the Premium Index to increase the funding rate for profit. Transaction costs can also be high due to volatile funding rates, and it can affect market liquidity.

If you want to work with funding rates, make sure to understand how they are calculated on each exchange, as each has its own method. Manage risks properly by not investing all your funds in one trade, using reasonable stop-losses, and limiting leverage. Keep monitoring the market continuously because funding rates always change over time.

In summary, funding is not just a technical mechanism but also a way for the market to self-balance. Anyone trading futures or perpetual swaps should understand it well to avoid unnecessary losses.