Most beginners treat funding like a “fee Binance charges.” It’s not. It’s a payment between traders — and it can quietly eat a good trade if you hold overnight without noticing.

What funding rate actually is

On perpetual futures, there is no expiry date. To keep the perp price glued near the spot index, longs and shorts periodically pay each other.

• Positive funding → longs pay shorts

• Negative funding → shorts pay longs

The exchange is the pipe, not the pocket that keeps that money.

Why it exists

If perps trade above spot, positive funding makes holding long more expensive, so price tends to cool back toward index. If perps trade below spot, negative funding does the opposite. It’s a tether, not a signal by itself.

3 beginner mistakes

1) Confusing funding with trading fees. Fees hit when you open/close. Funding hits while you hold across settlement windows.

2) Ignoring size × time. A “tiny” rate on a big leveraged position, held for days, compounds into real PnL damage.

3) Treating extreme funding as a free trade. Crowded side paying high funding can stay crowded longer than your margin lasts.

Practical filter (keep it simple)

Before holding a perp overnight, ask: who is paying whom, how large is my notional, and does this still make sense if funding stays against me for 2–3 settlements?

NFA — education only, not a trade call. DYOR.

What’s the last time funding quietly changed a trade you were holding?

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