Big move · Japan stocks
Advantest Corporation (6857) plunges 15.0% to JPY 34,340.00
Its biggest one-day fall in at least a year, on 2.1 times its 20-day average volume.
- Close
- JPY 34,340.00
- On the day
- −15.0%
- Volume
- 2.1× average
- vs 52-week high
- −17.9%
Advantest Corporation closing prices
The last 90 closes up to 15 October 2026. The live chart is on the 6857 page.
What happened
Advantest Corporation (6857) closed at JPY 34,340.00 on 15 October 2026, down 15.0% from JPY 40,380.00 the session before.
It was 6857's biggest one-day fall in at least a year. It was the third lower close in a row. Over 5 sessions the price is down 16.8%, and over 20 sessions it is up 8.3%.
The close is 17.9% below the highest close of the past year (JPY 41,850.00 on 6 Oct 2026) and 108.6% above the lowest (JPY 16,465.00 on 23 Oct 2025).
Trading was heavy: volume was 2.1 times its average of the sessions before.
Across the 31 TSE stocks we track, 11 closed higher and 20 closed lower that day, with a median change of −1.23%. 6857's change was −15.0%.
This page reports what the price and volume data show. It does not say why the price moved.
The numbers
| Previous close | JPY 40,380.00 |
|---|---|
| Close | JPY 34,340.00 |
| Change on the day | −14.96% |
| Change over 5 sessions | −16.83% |
| Change over 20 sessions | +8.26% |
| Volume | 26.18 Million |
| Average volume, up to 20 sessions before | 12.50 Million |
| Volume against that average | 2.1 times |
| Highest close in the past year | JPY 41,850.00 (6 Oct 2026) |
| Lowest close in the past year | JPY 16,465.00 (23 Oct 2025) |
The full chart and history are on Advantest Corporation (6857). More from this market: TSE news today.