Have you noticed that contract prices are always higher than spot prices? Do you want to know the reasons behind this price spread? Are you curious how to arbitrage from spot-futures spreads?
In March 2023, Zhang Ming from Shenzhen found BTC spot at $25,000, quarterly contract at $26,000, premium rate 4%. He bought spot and sold contracts, profiting $1,000/BTC at delivery 3 months later, annualized return 16%. This is the classic spot-futures arbitrage strategy.
In August 2023, Ms. Li from Shanghai observed ETH spot at $1,800, weekly contract at $1,750, showing -2.8% negative premium (backwardation). This signaled extreme market pessimism. She decisively bought contracts, profiting $100/ETH when price normalized after 1 week.
In November 2023, Mr. Wang from Beijing found SOL quarterly contract premium rate as high as 15%, far exceeding normal levels. He judged the market overly optimistic, sold contracts and bought spot, profiting 10% when premium rate fell to 5% after 2 weeks.
- Spread widening risk: Premium rate may continue expanding, arbitrage positions show floating losses
- Delivery risk: Spread must converge before delivery, but may fluctuate significantly during the process
- Capital cost risk: Spot-futures arbitrage requires large capital, capital costs may erode profits
- Liquidation risk: If using leverage for arbitrage, spread widening may cause liquidation
- Liquidity risk: Altcoins have large spot-futures spreads but poor liquidity, difficult to establish large arbitrage positions
- Trading fee risk: Frequent arbitrage trading fees may exceed spread profits
What is Contract Premium?
Generally refers to spot being relatively lower than contract price under normal supply-demand relationships, near-term contracts lower than far-term contracts.
Since the near-low far-high inter-contract basis relationship reflects market investors' optimistic expectations for future prices, it's also called a normal market.
Basic Premium Concepts
Contango: Contract price higher than spot price.
In March 2023, Mr. Chen from Hangzhou observed BTC market:
- Spot: $30,000
- Weekly contract: $30,100 (0.33% premium)
- Bi-weekly contract: $30,200 (0.67% premium)
- Quarterly contract: $30,600 (2% premium)
This is typical normal market, reflecting bullish expectations.
Backwardation: Contract price lower than spot price.
In June 2023, Ms. Liu from Guangzhou observed ETH market:
- Spot: $2,000
- Weekly contract: $1,980 (-1% backwardation)
- Bi-weekly contract: $1,960 (-2% backwardation)
- Quarterly contract: $1,900 (-5% backwardation)
This is inverted market, reflecting bearish expectations.
Premium Rate Calculation Formula
Premium rate = (Contract price - Spot price) / Spot price × 100%
Annualized premium rate = Premium rate / Days remaining × 365
In September 2023, Mr. Zhao from Chengdu calculated BTC quarterly contract:
- Spot: $25,000
- Quarterly contract: $25,750 (90 days to expiry)
- Premium rate: 3%
- Annualized premium rate: 3% / 90 × 365 = 12.17%
Contract Premium Formation Mechanism
Factor 1: Holding Cost
Holding spot requires capital cost, contract price should compensate this cost.
In October 2023, Ms. Wu from Xi'an analyzed:
- Spot: $40,000
- Capital cost: 5% annualized
- 90-day holding cost: $40,000 × 5% × 90/365 = $493
- Theoretical contract price: $40,493
Actual quarterly contract $40,800, premium rate 2%, annualized 8%, higher than capital cost.
Factor 2: Market Expectations
If market expects future price increases, contract price will be higher than spot.
In November 2023, Mr. Zheng from Changsha observed:
- BTC spot: $35,000
- Market expectation: Halving rally approaching
- Quarterly contract: $37,000 (5.7% premium)
Optimistic market expectations pushed up contract premium.
Factor 3: Supply-Demand Relationship
If long demand exceeds short demand, contract price will be pushed higher.
In December 2023, Mr. Huang from Chongqing found:
- ETH spot: $2,200
- Contract long-short ratio: 2:1 (strong long demand)
- Quarterly contract: $2,350 (6.8% premium)
Supply-demand imbalance caused abnormally high premium rate.
Factor 4: Funding Rate
Perpetual contract funding rate affects delivery contract premium.
In January 2024, Ms. Lin from Tianjin analyzed:
- BTC spot: $42,000
- Perpetual funding rate: 0.1%/day (36.5% annualized)
- Quarterly contract premium rate: 15% annualized
High funding rate makes delivery contracts relatively cheap, attracting capital inflow.
Contract Premium Arbitrage Strategies
Strategy 1: Cash-and-Carry Arbitrage (Buy Spot Sell Contract)
When premium rate is too high, buy spot and sell contract, wait for spread convergence.
In February 2024, Mr. Peng from Hefei found abnormal BTC premium:
- Spot: $45,000
- Quarterly contract: $47,250 (5% premium, 20% annualized)
- Operation: Buy 10 BTC spot, sell 10 BTC quarterly contracts
- 3 months later at delivery: Lock in $2,250/BTC profit regardless of price movement
- Total profit: $22,500 (20% annualized)
Strategy 2: Reverse Arbitrage (Sell Spot Buy Contract)
When backwardation occurs, sell spot and buy contract, wait for spread convergence.
In March 2024, Ms. Zeng from Suzhou found ETH backwardation:
- Spot: $3,000
- Weekly contract: $2,940 (-2% backwardation)
- Operation: Sell 50 ETH spot, buy 50 ETH weekly contracts
- 1 week later at delivery: Lock in $60/ETH profit
- Total profit: $3,000 (2% weekly return)
Strategy 3: Calendar Spread Arbitrage
Arbitrage from spreads between different expiry contracts.
In April 2024, Mr. Deng from Wuxi found:
- Weekly contract: $50,000
- Quarterly contract: $51,500 (spread $1,500)
- Normal spread should be: $50,000 × 5% × 85/365 = $582
- Excessive spread: $1,500 - $582 = $918
Operation: Buy weekly contract, sell quarterly contract, wait for spread convergence.
Strategy 4: Dynamic Arbitrage
Dynamically adjust positions based on premium rate changes.
In May 2024, Mr. Gong from Changzhou:
- Premium rate >15%: Establish full arbitrage position
- Premium rate 10-15%: Establish half arbitrage position
- Premium rate 5-10%: Establish 1/4 arbitrage position
- Premium rate <5%: No arbitrage
Through dynamic adjustment, his annualized return reached 18%.
Contract Premium Risk Management
Risk 1: Spread Widening
After establishing arbitrage position, spread may continue widening, showing floating losses.
In June 2024, Ms. Yao from Yangzhou:
- Entry premium rate: 10%
- 1 week later premium rate: 15% (spread widened)
- Floating loss: 5%
Countermeasures:
- Hold to delivery, spread must converge
- Set stop loss, close if spread widens beyond threshold
- Scale in positions, lower average cost
Risk 2: Capital Cost
Spot-futures arbitrage requires large capital, capital costs may erode profits.
In July 2024, Mr. Yuan from Nantong:
- Arbitrage return: 12% annualized
- Capital cost: 8% annualized
- Net return: 4% annualized
Countermeasures:
- Use low-cost capital (e.g., stablecoin lending)
- Choose high premium rate opportunities (>15%)
- Shorten arbitrage cycle, improve capital turnover
Risk 3: Liquidation Risk
If using leverage for arbitrage, spread widening may cause liquidation.
In August 2024, Mr. Qin from Zhenjiang:
- Used 5x leverage for arbitrage
- Premium rate widened from 10% to 15%
- Contract position floating loss 5%, leveraged loss 25%
- Approaching liquidation line
Countermeasures:
- Don't use leverage or use low leverage (2-3x)
- Reserve sufficient margin
- Set spread widening alerts
Risk 4: Liquidity Risk
Altcoins have large spot-futures spreads but poor liquidity, difficult to establish large positions.
In September 2024, Ms. Shi from Taizhou:
- Certain altcoin premium rate: 30% (very attractive)
- Attempted to establish $100,000 position
- Slippage: 5% ($5,000)
- Actual premium rate: 25%
Countermeasures:
- Choose liquid major coins
- Scale in positions to reduce slippage
- Use limit orders instead of market orders
Contract Premium Market Signals
Signal 1: Excessive Premium (>20%)
Market overly optimistic, may correct soon.
In October 2024, Mr. Tang from Yancheng observed:
- BTC premium rate: 25% (historical high)
- Market sentiment: Extreme greed
- Judgment: Short signal
He sold contracts and bought spot for arbitrage, profiting 15% when premium fell to 10% after 2 weeks.
Signal 2: Low or Negative Premium (<0%)
Market overly pessimistic, may rebound soon.
In November 2024, Ms. He from Lianyungang observed:
- ETH premium rate: -5% (rare backwardation)
- Market sentiment: Extreme fear
- Judgment: Long signal
She bought contracts and sold spot for arbitrage, profiting 10% when premium rose to 5% after 1 week.
Signal 3: Rapidly Expanding Premium
Market sentiment heating up rapidly, may form short-term top.
In December 2024, Mr. Wei from Huai'an observed:
- Premium rate rose from 5% to 20% in 3 days
- Market sentiment: FOMO spreading
- Judgment: Short-term top signal
He closed long positions early, avoiding subsequent 20% correction.
Signal 4: Rapidly Converging Premium
Market sentiment cooling rapidly, may form short-term bottom.
In January 2025, Mr. Wei from Suqian observed:
- Premium rate fell from 15% to 0% in 3 days
- Market sentiment: Panic selling
- Judgment: Short-term bottom signal
He bought contracts, price rebounded 15% after 1 week.
Premium Characteristics of Different Coins
BTC Premium Characteristics
BTC premium rate usually between 5-15%, relatively stable.
February 2024 data:
- Average premium rate: 8%
- Highest premium rate: 25% (bull market top)
- Lowest premium rate: -3% (bear market bottom)
ETH Premium Characteristics
ETH premium rate fluctuates more than BTC, usually between 3-20%.
March 2024 data:
- Average premium rate: 10%
- Highest premium rate: 35% (DeFi boom)
- Lowest premium rate: -8% (market panic)
Altcoin Premium Characteristics
Altcoin premium rates fluctuate extremely, may range from -20% to 50%.
April 2024 data:
- Hot altcoin: 50% premium rate
- Cold altcoin: -20% premium rate
- Volatility: Extremely high
FAQ
1. Why are contract prices usually higher than spot?
Because holding spot requires capital cost, contract price should compensate this cost. Additionally, markets usually have optimistic expectations for the future.
2. What premium rate is normal?
5-15% is normal for major coins, 10-30% for altcoins. Beyond these ranges may present arbitrage opportunities.
3. Is spot-futures arbitrage risky?
Yes. Main risks are spread widening, capital costs, liquidation risk, and liquidity risk. But if held to delivery, spread must converge.
4. How much capital is needed for spot-futures arbitrage?
Recommend at least $10,000 to start, better with $50,000+. Too little capital means trading fees take too large a proportion.
5. Is spot-futures arbitrage suitable for beginners?
Relatively suitable. Spot-futures arbitrage is low-risk strategy, returns are certain if held to delivery. But need to understand basic principles and risks.
6. How to choose arbitrage timing?
When premium rate is significantly above normal levels (e.g., BTC premium >15%), it's good arbitrage timing.
Key Takeaways
- Contract premium is when contract price exceeds spot price, reflecting market expectations for the future
- Normal premium rate 5-15% for major coins, beyond this range may present arbitrage opportunities
- Spot-futures arbitrage is low-risk strategy, buy spot sell contract, hold to delivery to lock in spread profit
- Main risks are spread widening and capital costs, requires sufficient capital and patience to hold
- Premium rate is important market sentiment indicator, extremes signal reversals
Further Reading
- Perpetual Contracts: Contract trading without expiry
- Funding Rate: Price anchoring mechanism for perpetual contracts
- Delivery Settlement: Automatic settlement at contract expiry
- Arbitrage Trading: Low-risk investment strategies
- Basis Trading: Advanced applications of spot-futures spreads
- Market Sentiment Indicators: Judging market tops and bottoms
