Nikkei Stock Average Futures Margin & Contract Specifications

What is the Nikkei 225?
The Nikkei Stock Average (Nikkei 225) is Japan’s most representative stock market index and one of the country’s oldest equity benchmarks. It consists of 225 leading companies listed on the Tokyo Stock Exchange (TSE), covering diverse sectors such as technology, consumer goods, and finance.
The Nikkei 225 is price-weighted, meaning that companies with higher stock prices exert a greater influence on the index’s overall performance. Denominated in Japanese yen, it is widely used as a barometer of the Japanese stock market.
Functions and Features of Nikkei 225 Futures
Nikkei 225 futures allow investors to participate in the overall performance of the Japanese stock market through a single contract, effectively simulating exposure to all 225 constituent stocks. With higher capital efficiency and trading flexibility, their main features include:
Multiple contract sizes: Available in standard, mini, and micro contracts, allowing investors to adjust position size based on capital and strategy.
Extended trading hours: Offered by the Osaka Exchange (OSE) and Singapore Exchange (SGX), with more than 20 hours of daily trading, making it easier to respond to global market developments.
High liquidity and tight spreads: Abundant market liquidity and relatively small bid-ask spreads facilitate short-term trading, arbitrage strategies, and hedging, improving trading efficiency.
Exchanges:
- Osaka Exchange (OSE)
- Singapore Exchange (SGX)
Key Factors Affecting Nikkei 225 Futures
1. Industry Weighting
Within the Nikkei 225, technology stocks account for 48.12%, reflecting Japan’s strength in electronics, telecommunications, and precision instruments. Consumer goods make up 26.09%, highlighting the importance of retail and services to the Japanese economy. Together, these two sectors comprise over 70% of the index, underscoring the Nikkei’s strong concentration in technology and consumer industries, while sectors like finance exert relatively less influence.
2. Corporate Earnings and Economic Data
Quarterly earnings reports and Japanese economic indicators such as GDP growth, industrial production, and unemployment directly influence the stock market and Nikkei 225 futures. Better-than-expected data boosts market confidence, while weaker results may trigger selling pressure.
3. Japanese Yen Exchange Rate
Fluctuations in the yen significantly affect export-oriented companies’ profitability.
Yen appreciation → Export revenues shrink when converted back to yen, usually pressuring the Nikkei.
Yen depreciation → Improves exporters’ competitiveness, often supporting the index.
4. Global Macroeconomic Environment and Geopolitical Risks
Events such as U.S.-China trade tensions, global monetary policy shifts, regional conflicts, natural disasters, and major elections can drive capital flows and risk sentiment, impacting Japanese equities and Nikkei futures.
5. Market Liquidity and Institutional Activity
Shifts in liquidity, along with trading strategies of large institutions and hedge funds, are major drivers of Nikkei 225 volatility. When trading volumes are high and capital flows are active, large block trades can significantly influence the index.
6. Japanese Politics and Monetary Policy
Rising political risks—such as uncertainty about the ruling coalition—can undermine confidence, weakening the yen and heightening futures volatility.
Post-election expansionary policies may temporarily boost the economy but can also raise government bond yields and weaken fiscal stability, adding pressure on futures.
Political uncertainty and unclear fiscal direction often ripple through bond yields, the yen, and ultimately Nikkei futures, creating a “elections → bond/FX turbulence → futures volatility” chain reaction.
Nikkei Stock Average Margin
How much money is needed to trade futures? At the beginning, the required margin is the initial margin. While holding a position, the margin after deducting floating profits and losses must remain above the maintenance margin; otherwise, a margin call will be issued. For day-trading margin, only half of the margin is required, provided the position is closed before the market closes.
Foreign Futures
Name | Code | Initial Margin | Approximate Cost in TWD | Maintenance Margin | Day Trading Margin |
---|---|---|---|---|---|
Nikkei Stock Average | SSI | JPY 1,430,000 | 291,291 | JPY 1,300,000 | JPY 715,000 |
OSAKA Nikkei Stock Average | JNM | JPY 242,847 | 49,468 | JPY 242,847 | JPY 242,847 |
Nikkei 225 micro Futures | JNU | JPY 24,285 | 4,947 | JPY 24,285 | JPY 24,285 |
Nikkei Stock Average Contract Specifications
Here is a summary for traders of the contract specifications, exchange, trading hours, minimum price fluctuation, and available trading months for Nikkei Stock AverageFutures, OSAKA Nikkei Stock AverageFutures, Nikkei 225 micro FuturesFutures.
Name/Code | $ Nikkei Stock AverageSSI |
---|---|
Exchange | Singapore Exchange Derivatives Trading Limited |
Category | Futures |
Local Trading Hours |
07:30-15:00 T+1 Session From 7 April |
Contract Specifications | Index × 500 yen |
Minimum Price Fluctuation | 5 points = 2,500 yen +/- 1070 points |
Trading Months | 3,6,9,12 |
Name/Code | $ OSAKA Nikkei Stock AverageJNM |
---|---|
Exchange | Osaka Exchange |
Category | Futures |
Local Trading Hours |
07:45~14:45 |
Contract Specifications | Index*100 yen |
Minimum Price Fluctuation | 5 points = 500 yen |
Trading Months | 3,6,9,12 |
Name/Code | $ Nikkei 225 micro FuturesJNU |
---|---|
Exchange | Osaka Exchange |
Category | Futures |
Local Trading Hours |
07:45~14:45 |
Contract Specifications | Index*10 yen |
Minimum Price Fluctuation | 5 points = 50 yen |
Trading Months | 3,6,9,12 |
Nikkei Stock AverageLast Trading Day
Futures
Commodity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Nikkei Stock Average (SSI) | First Notice Day | - | - | 03/13 | - | - | 06/12 | - | - | 09/11 | - | - | 12/11 |
Last Trading Day | - | - | 03/13 | - | - | 06/12 | - | - | 09/11 | - | - | 12/11 | |
OSAKA Nikkei Stock Average (JNM) | First Notice Day | 01/09 | 02/13 | 03/13 | 04/04 | 05/30 | 06/12 | 07/04 | 08/01 | 09/11 | - | - | 12/11 |
Last Trading Day | 01/09 | 02/13 | 03/13 | 04/04 | 05/30 | 06/12 | 07/04 | 08/01 | 09/11 | - | - | 12/11 | |
Nikkei 225 micro Futures (JNU) | First Notice Day | - | - | 03/13 | - | - | 06/12 | - | - | 09/11 | - | - | 12/11 |
Last Trading Day | - | - | 03/13 | - | - | 06/12 | - | - | 09/11 | - | - | 12/11 |