The world of cryptocurrency derivatives trading is evolving rapidly, and platforms that innovate with user-centric, capital-efficient solutions are leading the charge. OKX, a pioneering force in digital asset trading, has consistently pushed the boundaries of what’s possible in derivatives markets. From early adoption of futures and options to the development of unified trading accounts and advanced risk modeling, OKX continues to empower traders with cutting-edge tools. The latest milestone in this journey? The launch of the Portfolio Margin (PM) Account—a game-changing feature designed for professional options traders seeking superior capital efficiency and intelligent risk management.
This new offering allows users to trade across five major product types—spot, margin, futures, perpetuals, and options—within a single, integrated account structure. But more than just convenience, PM introduces a sophisticated risk-based margining system that recognizes hedging relationships between positions, significantly reducing required collateral for offsetting trades.
What Is a Portfolio Margin (PM) Account?
The Portfolio Margin (PM) Account is engineered for advanced traders, particularly those active in options and complex derivatives strategies. Unlike traditional margin models that assess each position in isolation, PM evaluates an entire portfolio’s risk profile using scenario-based stress testing, allowing for more accurate and efficient margin allocation.
In this mode, users transfer assets into a cross-margin account and gain the ability to seamlessly trade:
- Spot
- Margin
- Futures (Deliverable)
- Perpetual Contracts
- Options
All assets—regardless of denomination—are converted into USD-equivalent value for margin calculation purposes. This unified valuation enables greater flexibility: even if a specific cryptocurrency balance is insufficient, as long as the overall account equity in USD terms is adequate, trading can proceed. In such cases, the system may automatically initiate borrowing (with applicable interest), creating a liability in that asset.
A key differentiator from standard cross-margin systems is how derivative positions are evaluated. While net equity remains USD-denominated, derivative margin requirements are calculated through risk scenario modeling, not fixed rates. Positions with higher projected losses under stress conditions require more margin; those that hedge each other reduce overall exposure and thus lower margin needs.
👉 Discover how professional traders maximize capital efficiency with advanced margin models.
PM vs. Unified Account: Key Differences in Margin Efficiency
OKX’s Unified Account already offers flexibility with three modes:
- Simple (Spot-only)
- Single-Currency Margin
- Multi-Currency Cross-Margin
However, the Portfolio Margin Account goes further by integrating dynamic risk modeling into margin calculations. While both systems support multi-product trading, their margin logic diverges significantly—especially at scale.
When Does PM Shine?
For small positions or directional bets without offsetting legs, the benefits of PM may be minimal. But when managing large, hedged portfolios—especially those involving options selling or calendar spreads—the advantages become pronounced.
Consider these examples:
Example 1: Calendar Spread in BTC Futures
- Position: -200 BTC-USD-0625 +200 BTC-USD-0924
- Unified Account Maintenance Margin: 160 USD
- PM Account Maintenance Margin: 750 USD
Wait—higher in PM? Yes, but context matters. This reflects PM’s conservative stress-testing of price divergence risks between contracts. However...
Example 2: Large-Scale Calendar Spread
- Position: -75,000 lots BTC-USD-0625 +75,000 lots BTC-USD-0924
- Unified Account MM: 675,000 USD
- PM Account MM: 250,000 USD
Now the advantage is clear: PM recognizes the natural hedge and slashes required margin by over 60%.
Example 3: Bear Call Spread in Options
- Position: +100 BTC-USD-0924-50000-Call -100 BTC-USD-0924-58000-Call
- Unified Account MM: ~1.823 BTC
- PM Account MM: ~0.448 BTC
Again, PM rewards risk-defined strategies with dramatically lower capital requirements.
How Is Holding Margin Calculated in PM?
The Portfolio Margin model calculates holding margin in three structured steps:
Step 1: Group Positions into Risk Units
Positions are clustered by underlying index and instrument type. For example:
- All BTC-USD derivatives (futures, perpetuals, options) form one risk unit.
- Negative balances (liabilities) from borrowing form a separate risk unit.
Each unit is assessed independently for its risk exposure.
Step 2: Calculate Margin per Risk Unit
For derivatives, six risk factors are evaluated:
- Price Movement Risk
- Basis Risk (futures vs. spot)
- Volatility Risk (for options)
- Interest Rate Risk
- Time Decay (theta)
- Extreme Market Moves (e.g., 30% price shift)
The system runs stress tests across these dimensions and determines the worst-case loss scenario.
Step 3: Aggregate to Total Account Margin
Each risk unit’s margin requirement is converted to USD and summed to determine the total account margin.
👉 See how stress-tested margin models protect your portfolio during volatility spikes.
Understanding Derivative and Borrowing Margin
PM distinguishes between two types of margin components:
Derivative Margin
Computed using scenario analysis across all active derivatives within a risk unit. The formula considers:
Max{ [Max(price risk, extreme move risk, time decay) + basis risk + volatility risk + rate risk], Liquidation penalty + fees + slippage }
This ensures sufficient buffer against real-world market shocks.
Borrowing Margin
Based on actual or potential liabilities:
- Calculate outstanding borrowings per currency.
- Apply tiered initial and maintenance margin rates.
- Convert to USD and sum.
Final account margin = Derivative Margin + Borrowing Margin
How Is Order Margin Calculated?
Order margin is reserved before execution to ensure sufficient funds post-trade.
In simple cases—such as placing a single derivative order with no existing positions—the required margin equals the initial margin of that order.
But in complex portfolios:
- If a new order reduces overall portfolio risk (e.g., adding a hedge), no additional margin may be required.
- If it increases risk, only the incremental margin is charged.
- Orders that offset existing positions can even result in zero added margin.
Practical Examples:
- Holding 1,000 BTC call options → placing 1,000 ETH put options
→ No hedging effect → full initial margin applied. - Holding 10,000 BTC calls → placing 5,000 BTC puts
→ Reduces delta exposure → additional margin = $0 - Holding long BTC calls → placing short ATM call
→ Creates a defined-risk spread → likely no extra margin needed
This intelligent approach enables high-frequency and algorithmic traders to manage large order books without unnecessary capital lockup.
Trading Rules in Portfolio Margin Mode
Users can choose between cross-margin and isolated-margin modes for different products.
Key Features:
- All assets contribute to margin based on liquidity-adjusted USD value.
- Optional auto-borrow mode: enables trading even with zero balance in a specific coin, provided total equity supports it.
- Liabilities trigger interest charges once they exceed interest-free thresholds.
- If liabilities surpass safe limits, the system initiates automatic rebalancing via TWAP trades through USDT.
Auto-Borrow Mode: Order Validation Logic
An order succeeds if:
Account Effective Equity ≥ Total Occupied Margin (including new order)
Even with zero DASH balance, you can sell DASH if total USD equity covers potential borrowing costs and initial margin requirements.
Risk Controls: Preventing Forced Liquidations
PM includes layered safeguards to prevent abrupt liquidations:
1. Risk Control Cancellation Check
When equity drops below 91% of required initial margin:
- Cancel all futures/perpetuals/options cross-margin orders.
- Then cancel spot orders that could increase loss.
Also cancels orders that would increase real borrowing beyond limits.
2. Pre-Liquidation Check
Triggered when margin ratio ≤ 100%:
| Product | Action |
|---|---|
| Futures/Perps | Cancel all cross-margin and isolated opening orders |
| Margin | Same as above |
| Options | Cancel all pending opens |
If still under-margined after cancellation, forced liquidation begins.
Forced Liquidation Workflow (4 Stages)
- Dynamic Delta Hedging (DDH)
Automatically adjusts delta exposure using options or perps on the most stressed index to reduce margin pressure. - Inter-Tenure Hedging Reduction
Targets basis risk (MR4). If closing two offsetting positions (e.g., near-term and far-term futures) reduces overall risk, both are reduced simultaneously. - Standard Position Reduction
Prioritizes closing positions that improve equity-to-margin ratio. Executes partial closes based on market depth. Special Position Reduction
Final fallback:- Close positions aligned with overall portfolio delta.
- Test hypothetical closure of option + matching future.
- As last resort, close options with delta closest to ±0.5.
Process stops when margin ratio exceeds 120% or all risky positions are closed.
Frequently Asked Questions (FAQ)
Q: Who should use the Portfolio Margin Account?
A: Professional traders, especially those using options spreads, hedged futures positions, or multi-leg strategies who want optimized capital usage.
Q: Can I switch between PM and Unified Account modes?
A: Yes, users can switch between account types based on their current strategy and risk appetite.
Q: Does PM support isolated margin positions?
A: Yes. You can use both isolated and cross-margin modes within the PM framework for different products.
Q: Are there additional fees for using PM?
A: No direct fees. However, borrowed assets incur interest if liabilities exceed interest-free thresholds.
Q: How does auto-borrow work in PM?
A: When enabled, the system allows trading even with zero balance—by creating a temporary liability—as long as total account equity supports the position.
Q: Is historical data available for backtesting PM strategies?
A: While exact PM simulations aren’t public yet, OKX provides detailed documentation and sample scenarios to help estimate margin behavior.
👉 Start optimizing your trading capital with next-gen portfolio margining today.