I notice that many newcomers to crypto often overlook an important detail: the Funding Rate. But actually, if you understand how it works, you can leverage it to earn significant additional income.

So, what is funding? Simply put, it is a periodic fee that traders must pay to each other to maintain balance between Futures prices and the actual Spot price. When the futures contract price is higher than the market price, Long traders will pay Short traders. Conversely, when the Futures price is lower than Spot, Shorts will pay Longs. This mechanism is expressed as a percentage and varies over specific periods, usually every 8 hours.

Funding can be seen as a market sentiment indicator. When the Funding Rate is high, it reflects optimism among the crowd, with everyone betting on an upward trend. Conversely, when it’s negative, the market is fearful. That’s why you need to monitor it regularly.

Calculating funding is quite simple if you understand the components. The basic formula is that the Funding Rate is calculated based on the difference between the Premium Index and the Mark Price. The Premium Index is the difference between the futures price and the market price. The Mark Price is the current price of the contract, calculated from the average of recent trades. From there, you can calculate the Funding Fee by multiplying the open position volume by the Funding Rate.

A practical example I often use: if I buy $20,000 worth of BTC on Spot and simultaneously open a Short position of $20,000 on Futures, with a Funding Rate of 0.01%, then I receive about $6 daily from this fee. Over a year, that’s more than $2,000 with an APR of around 10% or higher. Not a huge number, but quite stable if you know how to manage risks.

However, this strategy only works when the Funding Rate is positive, and it fluctuates frequently. I can’t run it continuously. Additionally, it’s important to use low leverage to avoid price risks; this also serves as a risk management method for your portfolio.

Important notes when working with the Funding Rate: first, you must understand how each exchange calculates it, as rules may differ. Second, always manage risks well—never put all your money into a single position. Use stop-loss orders wisely. Third, monitor the market constantly because everything changes very quickly. Lastly, limit leverage, as it’s like a double-edged sword.

There are some risks you need to be aware of. If you don’t understand the mechanism thoroughly, you could end up paying a large amount. Some traders may intentionally place large buy/sell orders to manipulate the Premium Index and increase the Funding Rate for profit, which undermines fairness. Additionally, trading costs can increase significantly when the Funding Rate fluctuates sharply.

But if you master the knowledge of what funding is and know how to apply it, it’s a pretty effective way to generate passive income. Start by finding assets with high Funding Rates, then try a simple arbitrage strategy between Spot and Futures. Keep learning, experiment with small accounts first, and then scale up when you’re confident.