For those engaging in leveraged trading, understanding what the funding fee is can be one of the most critical costs. Simply put, it is a fee paid every hour you keep your position open. It is calculated over an average of 8-hour periods, meaning you encounter it three times a day. In rare cases, when the market is highly volatile, you might pay it up to four times.

So, how is this fee determined? This is where the interesting part begins. The price difference between the spot market and the futures market directly affects the funding rate. For example, if a pair is more expensive on the spot side than on the futures side, it indicates that short positions are dominant. During such times, the funding rate becomes negative, and those with short positions pay the longs.

The larger the price difference, the greater the weight of short positions, and the more negative the funding rate becomes. The system tries to balance itself in this way. Those on the long side can somewhat offset their positions thanks to these negative rates. So, when asked what the funding fee is, we can say it is essentially a market balancing mechanism.

If I were to give a piece of advice, instead of using funding rate data directly as a signal in your trading strategy, think of it as an indicator to understand the overall market sentiment. After all, the market often moves against the majority.