Lesson 3 of 12 · 10 min
USD/JPY: rates and safe-haven flows
Two forces pull on USD/JPY, the US–Japan yield gap and the yen's safe-haven role. Learn to tell which one is in charge and to size a yen trade so a sudden drop stays survivable.
By the end you'll be able to
- Explain how the US–Japan yield gap and the carry trade tend to push USD/JPY up in calm markets
- Explain why risk-off moves and intervention can pull USD/JPY down sharply
- Size a USD/JPY trade from the yen pip value and stress-test it for a sudden drop
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USD/JPY has climbed slowly for weeks. Then share markets slide one afternoon and the pair drops 200 pips with nothing on the calendar in Japan.
Meet USD/JPY
EUR/USDFiber
The deepest, cheapest market in forex: it can drift for days, then move hard on US data or a central-bank surprise.
LiquidityDeepest
The most traded pair in the world
Typical volatilityModerate
Ordinary days often 50–90 pips
Typical spread (shorter bar = cheaper)Tightest
Often under 1 pip in busy hours
Sensitivity to risk moodMild
Tends to dip in risk-off as the dollar is bought
When it moves (UK time)
Most active in the London session (about 07:00–13:00) and the London–New York overlap (about 13:00–17:00), usually the busiest stretch. Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
USD/JPY
A yield-gap pair that trades in Tokyo hours as well as New York, with sudden lurches when fear or Japan’s authorities step in.
LiquidityVery deep
Usually the second most traded pair
Typical volatilityAbove average
Usually more pips a day than EUR/USD (a yen pip is 0.01)
Typical spread (shorter bar = cheaper)Tight
Usually tight in active hours
Sensitivity to risk moodHigh
Tends to fall in risk-off as the yen is bought
When it moves (UK time)
Most active in Tokyo hours (about 00:00–09:00) and the London–New York overlap (about 13:00–17:00). Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
GBP/USDCable
EUR/USD’s livelier cousin: wider daily swings, sharp moves on 07:00 UK data and a long memory for political shocks.
LiquidityVery deep
Very deep, though thinner than EUR/USD
Typical volatilityAbove average
Often 70–120 pips; 100+ is not unusual on a busy day
Typical spread (shorter bar = cheaper)Tight
Often around 1–1.5 pips in busy hours
Sensitivity to risk moodModerate
Sterling is not a safe haven, so it tends to fall in risk-off
When it moves (UK time)
Most active in 07:00 UK data, the London open from about 08:00 and the London–New York overlap (about 13:00–17:00). Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
AUD/USDAussie
A liquid way to read China, commodities and global growth: it tends to rise with confidence and fall fast with fear.
LiquidityDeep
A liquid major, heavily traded for its size
Typical volatilityAbove average
Often 40–80 pips
Typical spread (shorter bar = cheaper)Tight
Usually tight; often a touch wider than EUR/USD
Sensitivity to risk moodVery high
Tends to rise on calm days and fall fast in a panic
When it moves (UK time)
Most active in Asia-Pacific hours (about 22:00–07:00), the London open and the London–New York overlap (about 13:00–17:00). Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
USD/CADLoonie
A North American pair loosely tied to oil: quiet in Asian hours and busiest when US and Canadian data land at 13:30 UK time.
LiquidityDeep
Deep, especially in North American hours
Typical volatilityModerate
Often 50–90 pips
Typical spread (shorter bar = cheaper)Tight
Tight in North American hours; a little wider than EUR/USD
Sensitivity to risk moodModerate
Risk-off tends to lift it: oil falls and the dollar is bought
When it moves (UK time)
Most active in the North American morning (about 13:00–17:00), staying livelier than European pairs into the evening. Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
USD/CHFSwissie
Usually calm and close to a mirror image of EUR/USD, but the franc is a safe haven and can lurch when markets panic.
LiquidityDeep
Smaller than EUR/USD by turnover, still deep
Typical volatilityModerate
Often 40–80 pips; sudden in a crisis
Typical spread (shorter bar = cheaper)Tight
Usually a little wider than EUR/USD
Sensitivity to risk moodModerate
Both sides are havens, so a panic can push it either way
When it moves (UK time)
Most active in the European open through the London–New York overlap (about 07:00–17:00), busiest from 13:00. Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
NZD/USDKiwi
A smaller, carry-sensitive commodity currency whose own news lands overnight for UK traders and which often shadows the Aussie.
LiquidityGood
Liquid in busy hours, thinner than the big majors
Typical volatilityAbove average
Often 40–70 pips
Typical spread (shorter bar = cheaper)Moderate
A little wider than EUR/USD; widens more when quiet
Sensitivity to risk moodVery high
Carry money arrives in calm markets and leaves fast in a panic
When it moves (UK time)
Most active in the Asia-Pacific window (about 20:00–03:00) for New Zealand news, and the London–New York overlap (about 13:00–17:00) for US data. Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
EUR/GBP
Two neighbouring economies whose currencies tend to drift together: small daily ranges, so the spread matters more.
LiquidityDeep
Deep in London hours, thin outside them
Typical volatilityQuiet
Often 30–50 pips
Typical spread (shorter bar = cheaper)Moderate
A little wider than EUR/USD, and large next to its range
Sensitivity to risk moodLow
Little direct link: both sides tend to react alike
When it moves (UK time)
Most active in the London session (about 07:00–16:30), busiest in the morning; quiet outside it. Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
EUR/JPY
A cross with two home markets, active from Tokyo through the London morning, that rises with confidence and falls with fear.
LiquidityDeep
Liquid in Tokyo and London hours
Typical volatilityHigh
Usually more pips a day than EUR/USD; 100+ on risk-off days
Typical spread (shorter bar = cheaper)Moderate
A little wider than EUR/USD or USD/JPY
Sensitivity to risk moodHigh
Tends to rise with confidence and fall with fear
When it moves (UK time)
Most active in Tokyo hours, then busiest from the Tokyo–London handover through the London morning (about 07:00–13:00). Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
GBP/JPY
The widest-ranging pair here: pound news and yen safe-haven swings combined, so stops need room and positions must be smaller.
LiquidityGood
Good in London hours; thin in late US hours
Typical volatilityVery high
Often 100–200 pips
Typical spread (shorter bar = cheaper)Wider
Wider than GBP/USD or USD/JPY, small next to its range
Sensitivity to risk moodHigh
Falls sharply when fear returns and carry trades unwind
When it moves (UK time)
Most active in stirs in Tokyo hours, then fully alive from the London open (about 07:00) through the overlap to about 17:00. Illustrative UK times; Asian-session hours shift by about an hour with daylight saving.
Main drivers
The USD/JPY card: deep liquidity, livelier than EUR/USD, and highly sensitive to the risk mood. Busy in Tokyo hours and in the London–New York overlap. Typical behaviour, not a forecast; figures are illustrative.
USD/JPY is the price of one US dollar in Japanese yen. At 150.00, one dollar buys 150 yen. When the price falls, the yen is strengthening, so a view that the yen will rise means selling the pair.
A pip here is the second decimal, 0.01. Because the yen is the quote currency, pip value is fixed in yen: ¥1,000 per standard lot. In dollars that is ¥1,000 ÷ 150 ≈ $6.67 at 150.00, and it changes as the price moves.
Look at the drivers on the card. Most of them belong to one of two forces.
Force one: the yield gap pushes it up
How a rate decision reaches a currency. For USD/JPY the chain runs through both the Federal Reserve and the Bank of Japan, and what matters is the gap between them.
Over weeks and months, USD/JPY has tended to follow the gap between US and Japanese interest rates. Traders often watch US Treasury yields as the running gauge of the US side. When they rise relative to Japanese yields, holding dollars pays more than holding yen, and the pair tends to rise.
On the other side, the Bank of Japan, Japan’s central bank, kept rates at or near zero for most of the period from the late 1990s. It began raising them in 2024, but they have stayed low by international standards.
That made the yen cheap to borrow. In a carry trade, investors borrow yen, sell it and buy higher-yielding assets. In calm markets that steady yen selling helps explain why USD/JPY can grind higher for months.
Force two: fear pulls it down
Tap a currency to see why it behaves this way.
Switch to risk-off and find JPY: it sits with the safe havens. The dollar is a haven too, but in many risk-off episodes the yen has done better, so USD/JPY has fallen. Tendencies, not rules.
The yen is also a safe haven: a currency investors tend to buy when they are frightened. When the risk mood turns from confident to fearful, carry trades are closed together. Investors sell what they bought and buy back the yen they borrowed. When many do that at once, the yen can jump and USD/JPY can fall very fast. Japan’s large holdings of foreign assets add to the effect when money comes home.
A clear example came in August 2024, when a Bank of Japan rate rise and weak US jobs data narrowed the gap from both sides and yen-funded positions were closed in a rush.
There is one more source of sudden drops. When the yen weakens fast, Japan’s Ministry of Finance has at times bought yen directly, as in 2022 and 2024. Nobody knows when, or whether, it will act again. A long position can be knocked several hundred pips lower within minutes.
The stop loss is what keeps step 6 from happening. In a true gap, though, a stop can fill beyond its level, which is called slippage, so a modest position size is your second line of defence.
Try it
The highlighted digit is the pip. For USD/JPY the pip is the second decimal and its dollar value depends on the price.
Notice how the dollar value of each pip rises as USD/JPY falls: at 147.00 a standard-lot pip is worth about $6.80, not $6.67, so a sharp drop costs a little more per pip than you sized for. Then set “Price after” to 151.50 and compare.
Quick check
Quick check
Question 1 of 5
USD/JPY moves from 150.00 to 148.50. What happened?
Question 2 of 5
Markets are calm, US Treasury yields are rising and the Bank of Japan is on hold. What does USD/JPY tend to do?
Question 3 of 5
Share markets fall hard and carry trades are being unwound. What tends to happen to a long USD/JPY position?
Question 4 of 5
A $5,000 account risks 1% on a USD/JPY trade at 150.00 with a 50-pip stop. Roughly what size?
Question 5 of 5
Japanese officials are issuing stronger and stronger warnings about a weak yen. What is a sensible response?
Go deeper: USD/JPY trading guide: yen pips, safe-haven flows and the BoJ · Safe-haven currencies: why USD, JPY and CHF rise in a crisis · The carry trade explained: how it works and when it unwinds