Rakuten Securities
楽天証券Brokerage (NISA/iDeCo) · Rakuten Securities
- Fees
- Varies
- English
- Partial
A leading low-cost brokerage for NISA and index-fund investing, integrated with Rakuten points and Rakuten Bank.
How stock and fund orders work in Japan
Market vs limit orders, mutual-fund NAV timing, trade date vs settlement, bid-ask spreads, and cancellation.
Direct answers
Stock orders can be market (fast, uncertain price) or limit (set price, may not fill); mutual-fund orders execute at a later once-daily NAV, and both settle a few business days after the trade date — so the displayed price is not always what you get.
Key points
- Market order (成行): fast execution at available prices, but the price is not guaranteed.
- Limit order (指値): executes only at your price or better, but may not fill.
- Mutual funds execute at a once-daily NAV calculated after the order cutoff — not the displayed price.
- Trade date (約定) and settlement date (受渡) differ; cash availability follows settlement.
- ETFs and stocks have a bid-ask spread; know cancellation rules before markets move.
Market and limit orders
For stocks and ETFs, the two basic order types trade certainty of execution against certainty of price. A market order (成行) executes promptly at whatever prices are available, so it is likely to fill but the exact price is not guaranteed — risky in a fast-moving or thin market. A limit order (指値) executes only at your specified price or better, giving you price control at the risk that it may not fill at all.
Beginners often assume the price they see is the price they will get; with a market order it may not be, especially for less liquid securities. Using limit orders for anything but the most liquid names is a simple way to avoid nasty surprises.
Fund NAV timing
Mutual funds work differently: they do not trade continuously at a live price. When you place a fund order, it executes at the net asset value (基準価額) calculated once per day after the order cutoff. So the price you ultimately pay is not the one displayed when you order — it is the later-calculated NAV, which can be higher or lower.
A common beginner mistake is assuming the displayed figure is guaranteed. For a ¥10,000 recurring fund purchase, this is usually fine and predictable, but understand that the executed price reflects the day’s NAV, not a real-time quote.
Settlement, spreads, and cancellation
The trade date (約定, when your order executes) and the settlement date (受渡, when cash and securities actually change hands) are not the same — settlement follows a few business days later, and your cash availability and withdrawal timing follow settlement, not the trade date. Plan around this if you need proceeds by a specific date.
Stocks and ETFs also carry a bid-ask spread (the gap between buy and sell prices) as an implicit cost, unlike a mutual fund’s single daily NAV. Finally, know the cancellation rules: once an order executes it cannot be undone, and fund orders past the cutoff execute at the next NAV. Understanding these mechanics prevents the most common execution mistakes.
Who this is for
- New investors placing their first orders
- People confused by fund pricing
What this is not
- Experienced traders
- Readers wanting platform-specific steps
Important cautions
- A market order’s price is not guaranteed, and a fund executes at a later NAV — the displayed price is not final.
Related products & services
SBI Securities
SBI証券Brokerage (NISA/iDeCo) · SBI Securities
- Fees
- Varies
- English
- Partial
Japan’s largest online brokerage by accounts, with a very broad low-cost fund lineup and full NISA/iDeCo support.
Monex Securities
マネックス証券Brokerage (NISA/iDeCo) · Monex
- Fees
- Varies
- English
- Partial
An established online brokerage often chosen for US-stock access and research tools, with NISA and iDeCo support.
Frequently asked questions
What should a beginner invest in inside NISA?
This is education, not a recommendation. Most beginners research low-cost, broadly diversified index funds — for example all-country (全世界株式) or S&P 500 trackers — rather than picking individual stocks, because low fees and diversification are within your control while returns are not. Understand that values fall as well as rise, match the risk to your time horizon, and never invest money you may need soon.