Rebalancing is the periodic adjustment of your positions to maintain delta-neutrality in a multi-exchange funding arbitrage strategy.
🎯 Key Point
Being delta-neutral at opening does NOT guarantee staying delta-neutral over time. Prices on different exchanges diverge, causing your hedge to drift.
Why Rebalancing Is Necessary
The Problem: Basis Drift
When you open a delta-neutral position across two exchanges, prices evolve differently on each exchange. This price divergence is called the basis.
Example:
| Moment | Exchange A Price | Exchange B Price | LONG Exposure | SHORT Exposure |
|---|---|---|---|---|
| Opening | $100 | $100 | $10,000 | $10,000 |
| Later | $120 | $115 | $12,000 | $11,500 |
⚠️ Result
You now have a hidden LONG delta of $500. Your positions are no longer balanced, and you're exposed to directional risk without realizing it.
What Causes Neutrality to Break
- Basis drift: Prices on Exchange A and B diverge
- Asymmetric funding: Funding payments modify margin differently
- Contract differences: Multipliers, rounding, minimum order sizes
When to Rebalance
Asymmetry Thresholds
How to Calculate Asymmetry
Example:
- Notional A = $12,000
- Notional B = $11,500
- Average = $11,750
- Asymmetry = |12,000 - 11,500| ÷ 11,750 × 100 = 4.26%
At 4.26%, you're still under the 5% threshold—no immediate action needed.
Other Triggers for Rebalancing
| Trigger | Threshold | Priority |
|---|---|---|
| Notional asymmetry | > 10-15% | 🔴 High |
| Persistent basis | > 2% for > 1 hour | 🟠 Medium |
| Liquidation risk | Margin < 20% on one leg | 🔴 High |
| Funding doesn't compensate | Funding < rebalancing fees | 🟡 Low |
How Rebalancing Works
Rebalancing means adjusting position sizes so that current USD exposure on each side is aligned again.
📊 Rebalancing Action
If your LONG exposure is $12,000 and SHORT is $11,500:
- Target: ~$11,750 on each side
- Action: Reduce LONG by ~$250 (sell some tokens)
- Result: Both legs back to equal notional
Two Types of Rebalancing
Type A: Defensive Rebalancing (Using Cash)
When the asymmetry might be temporary, use available cash to add to the smaller leg instead of reducing the larger one.
- Goal: Maintain neutrality without crystallizing losses
- When: Asymmetry may revert soon
- Tool: Cash reserves / free margin
- Effect: Flexibility and stability
Type B: Offensive Rebalancing (Reducing Notional)
When the asymmetry has persisted and represents a structural gain, reduce the dominant leg to lock in profits.
- Goal: Lock in structural gains
- When: Asymmetry has persisted or paid funding
- Tool: Reduction of the dominant leg
- Effect: Profit security without exiting
What Happens Without Rebalancing
Scenario: No Rebalancing
| Position | Entry | Exit | PnL |
|---|---|---|---|
| LONG (100 tokens) | $100 | $130 | +$3,000 |
| SHORT (100 tokens) | $100 | $125 | -$2,500 |
| Total | +$500 | ||
This $500 profit is directional—if the market had gone down, it would be a loss.
Scenario: With Rebalancing at T2
At T2 (when basis appeared), you reduced LONG from 100 to 96 tokens:
| Position | Entry | Exit | PnL |
|---|---|---|---|
| LONG (96 tokens) | $100 | $130 | +$2,880 |
| SHORT (100 tokens) | $100 | $125 | -$2,500 |
| Total | +$380 | ||
This $380 profit is structural—it comes from basis capture, independent of market direction.
🚨 Never Rebalancing = Hidden Risk
If you never rebalance:
- Delta drifts silently
- Exposure grows unnoticed
- Liquidation risk becomes asymmetric
- Funding gains can be wiped by one move
What looks like "I am delta-neutral" becomes "I am directionally exposed without realizing it."
When NOT to Rebalance
- Micro-adjustments: When fees exceed the benefit
- Transient basis: When the spread closes quickly
- High fees: When trading costs eat the edge
- Continuing drift: When basis keeps widening after rebalancing
🎯 Decision Guide: Reduce or Increase?
When rebalancing, you have two options: reduce the larger position or increase the smaller position. Here's how to choose:
✅ Best Case: Reduce the Larger Position
When to Reduce (Close Partial)
- The larger leg is in profit (PNL > 0): Reducing crystallizes gains permanently
- You want to lock in structural profits: The basis has moved in your favor
- You don't have extra margin available: No cash to add to smaller leg
- The asymmetry has persisted: It's not a temporary fluctuation
Example: Your Hyperliquid leg is $500 larger AND has +$50 PNL → Reducing it locks in ~$50 profit while restoring balance.
✅ Best Case: Increase the Smaller Position
When to Add (Increase Size)
- The larger leg is in loss (PNL < 0): Reducing would crystallize losses—avoid this!
- You have available margin: Cash on the smaller exchange to add
- The asymmetry is temporary: Prices may converge soon
- You want to maintain total exposure: Keep your funding income potential
Example: Your Paradex leg is $500 smaller, but your Hyperliquid leg has -$30 PNL → Adding to Paradex avoids locking in the loss.
📊 Quick Decision Matrix
| Larger Leg PNL | Available Margin? | Recommended Action |
|---|---|---|
| Positive (+) | Any | 📉 Reduce larger — Lock in profits |
| Negative (-) | Yes | 📈 Increase smaller — Avoid crystallizing loss |
| Negative (-) | No | ⏸️ Wait — Or accept the loss if urgent |
| ~Zero | Yes | 📈 Increase smaller — Maintain exposure |
| ~Zero | No | 📉 Reduce larger — No loss to crystallize |
⚠️ Golden Rule
Never reduce a losing leg just to rebalance. If the larger leg is in loss, adding to the smaller leg is almost always better—unless you have no margin available.
Key Takeaways
💡 Remember
- Rebalancing doesn't maximize PnL—it minimizes unwanted directional risk
- In multi-exchange, neutrality must be verified continuously—not just at opening
- Rebalancing transforms temporary asymmetry into structural profit—while keeping neutral exposure
- Cash reserves are essential—they absorb temporary imbalances
- Check PNL before choosing: Reduce winners, add to avoid crystallizing losers
New to delta-neutral trading?
Start with the basics of why notional-based hedging matters.
Read Delta-Neutral Explained →