# Delta-Neutral Hedging on Aster: Earning Funding Without Price Exposure

> How a delta-neutral funding position works on Aster: spot long plus perp short, Multi-Asset collateral, 90 days of real funding data, fees, and the risks.

- Source: https://asterpedia.com/guides/trading/delta-neutral-hedging-on-aster
- Category: trading
- Published: 2026-11-02
- Updated: 2026-11-02
- Publisher: Asterpedia (https://asterpedia.com)

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**A delta-neutral funding position on Aster pairs the coin held on spot with an equal short on the matching perpetual.** Price moves on the two legs cancel. What remains is the funding the short leg pays or receives at each settlement, minus fees, slippage and the cost of the margin you keep behind the short.

This guide walks through how to build the position on Aster, how funding lands on it, what 90 days of real settlements on five markets added up to, and the ways it loses money. It builds on [how funding rates work on Aster](https://asterpedia.com/guides/trading/how-funding-rates-work-on-aster), which covers the formula itself. Nothing here is a forecast or a recommendation to run the trade. Past funding says nothing about the next settlement.

> **Key takeaway:** Long spot plus short perp of the same size leaves you with almost no price exposure and a funding line instead. When the rate is positive the short receives it; when it turns negative the short pays. Over the 90 days to November 1, 2026, BTCUSDT funding added up to +1.54% of the position's size, before a 0.16% all-taker cost to open and close both legs.

## What is a delta-neutral position?

Delta is how much a position's value changes when the price of the underlying moves. A spot holding of 1 BTC has a delta of 1: if BTC rises 100 USDT, the holding gains 100 USDT. A 1 BTC short on the BTCUSDT perpetual has a delta of minus 1. Hold both and the combined delta is close to zero. A move in BTC, up or down, shows up as a gain on one leg and a matching loss on the other.

The point of building that is the perp leg's funding. [Aster's funding documentation](https://docs.asterdex.com/trading/perpetuals/fees-and-specs/funding-rate) states that at a positive rate, longs pay shorts, and at a negative rate, shorts pay longs. The spot leg never pays or receives funding. So the hedged pair is a funding position with the price risk mostly removed.

"Mostly" matters. The two legs are valued at different prices (spot price on one side, the perp's mark price on the other), the short needs margin that can run out, and funding changes sign. Those are covered under [what can still go wrong](#what-can-go-wrong).

### Why Hedge Mode does not do this

Aster's [Hedge Mode](https://docs.asterdex.com/trading/perpetuals/hedge-mode) lets you hold a long and a short on the same contract at once. That pair is price neutral too, but both legs settle funding at the same rate in opposite directions. The short receives exactly what the long pays, the net is zero, and you pay fees on both. The offsetting leg has to sit outside the perpetual you are shorting.

## How do you build one on Aster?

Aster lists spot markets for the main perps. On November 2, 2026, the spot `exchangeInfo` endpoint showed BTCUSDT, ETHUSDT, SOLUSDT, BNBUSDT and ASTERUSDT all trading, so both legs can sit on the same venue. There are two ways to arrange them.

### Option 1: spot holding plus a USDT-margined short

1. Buy the coin on Aster spot. The [spot trading guide](https://asterpedia.com/guides/trading/spot-trading-guide) covers the order ticket. The coin stays in your spot balance.
2. Put USDT in the Perps Account as margin for the short.
3. Open a short on the matching perp for the same quantity of coin, not the same USDT amount. If you bought 0.1 BTC, short 0.1 BTC.

Per the [margin docs](https://docs.asterdex.com/trading/perpetuals/margin), the initial margin is position size × mark price ÷ leverage. A 10,000 USDT short at 2x needs 5,000 USDT of margin, so this setup ties up roughly 15,000 USDT for 10,000 USDT of hedged exposure. Lower leverage means more capital and a liquidation price further away. The weakness is that the two legs live in separate balances. When the price rises, the spot leg gains in your spot account while the short loses margin in the Perps Account, and nothing moves one into the other automatically.

### Option 2: the coin as collateral in Multi-Asset Mode

[Multi-Asset Mode](https://docs.asterdex.com/trading/perpetuals/single-asset-mode-and-multi-asset-mode) lets the Perps Account use assets other than stablecoins as margin, in cross margin only. Each asset counts at a collateral value ratio. On Aster's BNB Chain deployment the docs list BTC, ETH and BNB at 95%, ASTER at 80%, and on Solana, SOL at 90%. In this setup the coin sits in the Perps Account as collateral and the short sits on top of it.

When the price rises, the collateral gains value in the same account where the short is losing, so the gain helps support the losing leg's margin. That netting is what this layout buys you. It has its own costs:

- Losses and funding payments on the short settle in USDT, and in Multi-Asset Mode your USDT balance can go negative. The docs charge hourly interest on a negative balance beyond minus 1,000 USD, at a current annualized rate of 4%. On a long hold through a rally, that interest is a direct cost against the funding the short collects.
- If a negative balance reaches minus 10,000 USD, the docs describe an automatic exchange of your collateral into USDT, with a haircut.
- Only part of the coin's value counts as margin (95% for BTC, 80% for ASTER), so you need a little more than a one-for-one hedge's worth of collateral.

The [bStocks collateral guide](https://asterpedia.com/guides/trading/tokenized-stocks-collateral-perps) goes through how a shared cross-margin pool behaves when collateral and positions move together.

### What about negative funding?

When funding is negative, the side that gets paid is the long. A neutral version of that trade needs a short on spot to offset the perp long, which means borrowing the coin. Aster's spot documentation describes buying and selling tokens you hold and does not describe spot borrowing, so the reverse trade cannot be built on Aster alone. This guide covers only the spot long and perp short version.

## How is funding paid, and how often?

Funding on the short leg is position size × mark price × funding rate at each settlement, credited to or taken from the Perps Account balance. If that balance is short when a payment is due, the docs say it may come out of position margin, which moves the liquidation price.

The interval depends on the market. The docs give 8 hours as the default, but the `fundingInfo` endpoint on November 2, 2026 showed BTCUSDT, ETHUSDT, SOLUSDT and BNBUSDT on 8 hours and ASTERUSDT on 4 hours. Aster can change the interval, cap and floor during volatile markets without notice, so read them per market before comparing two rates. The formula, the per-market caps and the timing note (a 15-second deviation around each settlement) are all in [how funding rates work on Aster](https://asterpedia.com/guides/trading/how-funding-rates-work-on-aster).

## What has funding on major Aster markets looked like?

These figures come from every settlement Aster's `fundingRate` endpoint returned between **August 4, 2026 00:00 UTC and November 1, 2026**, the 90 days before this guide was written. "Per 10,000 USDT" holds the short's notional fixed at 10,000 USDT to keep the arithmetic visible. In practice each settlement uses the mark price at that moment.

| Market (interval) | Settlements | Positive / negative | 90-day total | Per 10,000 USDT short |
|---|---|---|---|---|
| BTCUSDT (8h) | 270 | 250 / 20 | +1.5368% | 153.68 USDT |
| ETHUSDT (8h) | 270 | 245 / 25 | +1.5094% | 150.94 USDT |
| SOLUSDT (8h) | 270 | 205 / 65 | +1.1628% | 116.28 USDT |
| BNBUSDT (8h) | 270 | 123 / 0 | +0.7055% | 70.55 USDT |
| ASTERUSDT (4h) | 540 | 378 / 29 | +2.8414% | 284.14 USDT |

Settlements that were neither positive nor negative printed exactly zero: 147 on BNBUSDT and 133 on ASTERUSDT, all of ASTERUSDT's falling between August 4 and September 22.

**Negative runs were short but real.** BTCUSDT's longest run of negative settlements was 5 in a row, or 40 hours. ETHUSDT's was 7 in a row, 56 hours. SOLUSDT settled negative in almost a quarter of its periods. On the days those runs happened, a short leg paid instead of earning.

**The monthly total moved.** BTCUSDT funding came to +0.5558% from August 4 to 31, +0.4290% in September and +0.5220% in October. ASTERUSDT swung further: +0.9686%, +0.4305% and +1.3449% over the same three stretches.

**The highest total came with the most volatile collateral.** ASTERUSDT paid the most to shorts over the window, and it is also the asset Aster discounts most as collateral (80% against 95% for BTC). Its single settlements ranged from −0.0209% to +0.0657%, against −0.0074% to +0.0100% for BTCUSDT.

The [Aster funding rate history](https://asterpedia.com/markets/funding-rate-history) page recomputes 30-day and 90-day totals for every featured market at each build, so its numbers will drift from this table as new settlements come in.

> **Warning:** These are realized past settlements on five markets over one 90-day window. They do not predict what any market will pay next, and a short can pay funding for days at a time. The amounts are before fees, slippage, margin interest and any loss from liquidation.

## What can still go wrong?

**Liquidation on the short leg.** In Option 1 the short is a normal margined position. A sharp rally drains its margin while the matching gain sits in a different balance. If margin runs out, the short is closed and you are left holding unhedged spot. The [liquidation guide](https://asterpedia.com/guides/trading/how-liquidation-works-on-aster) shows how maintenance margin and the liquidation price are worked out. Option 2 reduces this by netting the collateral gain, but in exchange you take on the negative-balance interest and auto-exchange rules above.

**Funding flips negative.** Every negative settlement is a payment from the short. A long enough run can wipe out weeks of earlier funding.

**Fees and slippage.** Opening and closing takes four fills. At base rates (from the [Aster fees guide](https://asterpedia.com/guides/fees/aster-fees-explained)), on a 10,000 USDT position:

| Fill | Taker | Maker |
|---|---|---|
| Spot buy (open) | 4.00 USDT | 0.50 USDT |
| Perp short (open) | 4.00 USDT | 0 |
| Spot sell (close) | 4.00 USDT | 0.50 USDT |
| Perp buy back (close) | 4.00 USDT | 0 |
| **Round trip** | **16.00 USDT (0.16%)** | **1.00 USDT (0.01%)** |

Maker orders can rest on the book and not fill, which leaves one leg open while the other is still waiting. Slippage on market orders comes on top of the fee. VIP tiers lower these rates, paying spot fees in ASTER takes 5% off them, and the [referral program](https://asterpedia.com/referral) pays a 5% rebate on fees after the fact.

**Basis.** The perp's PnL is valued at its mark price and the spot leg at the spot price. They track each other closely but not exactly, so the hedge drifts while it is open, and the two closing fills will not land at the same price.

**Rule changes.** Aster can change a market's interval, cap and floor, and the docs do not promise an announcement when it does.

## When does it stop being worth it?

The arithmetic is a comparison of what the short receives against what the position costs. Over the 90-day window, BTCUSDT funding averaged about 1.71 USDT a day per 10,000 USDT short (153.68 ÷ 90). At that past average:

- An all-taker round trip of 16 USDT took a little over 9 days of funding to cover.
- An all-maker round trip of 1 USDT took less than one day.
- In Option 2, every 10,000 USDT of negative USDT balance beyond the free 1,000 USD costs about 1.10 USDT a day at the docs' 4% annualized rate (10,000 × 4% ÷ 365). That alone would absorb most of the window's average daily funding.

Those numbers shift with every settlement, and the same sums on SOLUSDT or BNBUSDT come out much thinner. The position stops paying for itself when the funding coming in no longer covers fees, slippage and margin costs, and on a market with frequent negative settlements that can happen within days. This page does not say whether any market will clear that bar, now or later.

## Where to check the numbers yourself

- **Live and past funding on Aster.** The funding pages on **[asterdex.com](https://www.asterdex.com/en/referral/MMTz04)** show each market's current rate, interval, cap and floor.
- **On this site.** The [funding rate history](https://asterpedia.com/markets/funding-rate-history) page and the market pages, such as [BTC](https://asterpedia.com/markets/btc), read the interval per market. The [Aster API reference](https://asterpedia.com/ecosystem/aster-api-reference) shows the `fundingRate` and `fundingInfo` response shapes, both public and keyless.
- **Fees.** The [Perp DEX Fee Index](https://asterpedia.com/fee-index) puts Aster's base round trip next to other venues.

This page describes a mechanism and reports past data. It is not investment advice and does not suggest opening, holding or hedging any position. Asterpedia is an independent guide with a referral relationship, as set out on the [disclaimer](https://asterpedia.com/disclaimer).

## Frequently asked questions

### What is a delta-neutral funding position on Aster?

It is a pair of positions whose price moves cancel out: usually the coin held on Aster spot and an equal-sized short on the matching Aster perpetual. Price gains on one leg are offset by losses on the other, so what is left is the funding paid or received by the perp leg, minus trading costs. When funding is positive, the short leg receives it.

### Can I use Hedge Mode on Aster to earn funding?

No. Hedge Mode lets you hold a long and a short on the same perpetual contract at once. Both legs settle funding at the same rate in opposite directions, so whatever the short receives the long pays, and the net is zero before fees. A funding position needs the offsetting leg to sit outside that perpetual, for example on spot or as collateral.

### What happens to an Aster delta-neutral position when funding turns negative?

The short perp leg pays funding instead of receiving it. Aster's docs state that at a negative rate shorts pay longs. Over the 90 days to November 1, 2026, BTCUSDT settled negative 20 times out of 270, with the longest run lasting five settlements in a row. The position keeps its price neutrality but loses money on funding during those periods.

### How much does it cost to open and close a hedged position on Aster?

At Aster's base rates, a perp taker order costs 0.04% and a spot taker order 0.04%, so opening and closing both legs with taker orders costs 0.16% of one leg's size. With maker orders on both legs the cost falls to 0.01%, because perp maker fees are 0% and spot maker fees are 0.005%. Slippage and spread come on top.