---
title: "ChipMOS filed NT$805.5 million in Advantest equipment orders that ran through a two-day, 25% drop"
description: "The purchase orders run from April 8 to November 10, straight through the two-day selloff that took about a quarter off Advantest after record half-year results and a raised forecast. The receipt matters to anyone holding the tester duopoly, Advantest and Teradyne, into the November 12 fireside chat."
publisher: "The Inference"
section: "Chips"
published: 2026-11-10T14:18:04.894Z
modified: 2026-11-10T14:18:04.894Z
canonical: https://theinference.org/article/chipmos-filed-nt-805-5-million-in-advantest-equipment-orders-that-ran-through-a-two-day-25-drop
language: en
keywords: "Advantest, ChipMOS, Teradyne, Semiconductor Equipment, AI Memory, Stock Selloff"
---

# ChipMOS filed NT$805.5 million in Advantest equipment orders that ran through a two-day, 25% drop

> The purchase orders run from April 8 to November 10, straight through the two-day selloff that took about a quarter off Advantest after record half-year results and a raised forecast. The receipt matters to anyone holding the tester duopoly, Advantest and Teradyne, into the November 12 fireside chat.

[ChipMOS](https://theinference.org/markets/companies/chipmos-technologies), a Taiwanese company that assembles and tests chips for other semiconductor makers, [filed a receipt on November 10: a Form 6-K](https://www.sec.gov/Archives/edgar/data/1123134/000119312526454328/0001193125-26-454328-index.htm), the report foreign issuers lodge with the SEC, disclosing NT$805,498 thousand of machinery equipment and accessories bought from [Advantest Taiwan](https://theinference.org/markets/companies/advantest) for manufacturing use [1][2]. The purchases run from April 8 to November 10, approved at the president's level [1], and Taiwan's rules made the deal public once it crossed NT$500 million [2]. That window spans the entire selloff. In Tokyo, Advantest closed at ¥29,690 on November 10, up 4.63 percent [3].

## A record half, then a quarter gone in two days

Advantest, with [Teradyne](https://theinference.org/article/advantest-and-teradyne-test-the-world-s-ai-memory-three-rivals-just-tested-them), builds the automated test equipment every AI accelerator and memory stack must pass before it reaches a datacenter. Its first half of fiscal 2026, the six months to September 30, set records on every line: net sales of ¥845.2 billion, up 60.5 percent; operating income of ¥456.8 billion, up 96.5 percent; net income of ¥368.1 billion, up 116.8 percent [4]. It raised the full-year forecast with them [4].

*Chart: **Advantest raised every line of its FY2026 forecast on October 28** Advantest's previous and October 28 forecasts for fiscal 2026 net sales, operating income and net income, in billions of yen*

*Company guidance for the fiscal year ending March 31, 2027, in billions of yen. Source: Advantest FY2026 Q2 results, October 28, 2026 [4]. [4]*

Tokyo's answer was to sell the record. Advantest [fell 14.7 percent on November 5 and another 12.2 percent on November 6](https://www.ibtimes.com.au/japan-nikkei-bear-market-ai-stock-selloff-1878028); one after the other, the two sessions took about 25 percent [5]. The Nikkei 225, Japan's benchmark, lost 5.96 percent to 57,434.77, more than 20 percent under its June 22 peak of 72,831.73 [5].

The trigger was political: after the Democrats' midterm sweep, investors priced tighter datacenter rules, following a 5.5 percent Nasdaq fall [6]. And ¥57.0 billion of the half's pretax profit was financial income, ¥54.2 billion of it valuation gains, a finance tailwind rather than tester demand [7].

## The bottleneck both earnings calls named was supply

[Teradyne](https://theinference.org/markets/companies/teradyne), the other half of the duopoly, met the same mood. Its [third-quarter revenue](https://finance.yahoo.com/markets/stocks/articles/teradyne-reports-third-quarter-2026-203000331.html) was $1,306 million, up 70 percent and above the top of its own guidance, with a fourth-quarter range of $1,250–1,350 million [8]; as [The Inference noted beforehand](https://theinference.org/article/teradyne-reports-october-27-with-a-guide-below-its-1-33-billion-record), that sits under the $1.33 billion June-quarter record. The stock still fell about 6.6 percent [9].

More than 60 percent of Teradyne's sales are AI-related, and five customers are 44 percent of revenue [10]. The research firm [SemiAnalysis](https://theinference.org/markets/companies/semianalysis) read both calls and put the market's size and its ceiling in one line: "the ATE TAM is growing on AI compute, and supply, not demand, is the constraint through 2027" [11]. Advantest's own release agrees, expecting a record tester market in calendar 2026 and saying demand for memory and other key components still exceeds supply [4].

## One receipt, and two dates that decide

The filing covers a single customer, and the bears hold real cards: a Q4 guide traders read as a plateau [9], a regulation risk that lives in Congress rather than the fab [6], and a Nikkei that ran far on AI enthusiasm before it fell [5].

The deciding dates are booked. Advantest holds its investor fireside chat on November 12 [3] and files its semi-annual securities report on November 13, with an interim dividend of ¥49 payable December 1 [4].

The tell is parts: if management still says it cannot source components fast enough, the raised forecast is a factory problem, and factory problems leave evidence. Two sessions took a quarter off Advantest's value, and the purchase orders kept coming all the way down.

## Takeaway

ChipMOS's 6-K shows NT$805.5M of Advantest tester orders straight through the selloff.

## Sources

1. [SEC EDGAR, ChipMOS Technologies Inc. Form 6-K: acquisition of machinery equipment from Advantest Taiwan, filed November 10, 2026](https://www.sec.gov/Archives/edgar/data/1123134/000119312526454328/0001193125-26-454328-index.htm)
2. [Quantisnow, "ChipMOS TECHNOLOGIES (IMOS): Acquires NT$805.5M of machinery equipment from Advantest Taiwan," November 10, 2026](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-chipmos-technologies-inc-6782503)
3. [Advantest Corporation, Investors page (IR calendar, November 12 fireside chat; share price November 10, 2026), accessed November 10, 2026](https://www.advantest.com/en/investors/)
4. [ad-hoc-news.de, "Advantest stock outlook rises after record half-year results," November 10, 2026](https://www.ad-hoc-news.de/boerse/news/corporate-news/advantest-stock-outlook-rises-after-record-half-year-results/70484682)
5. [International Business Times (AU), "Nikkei Crashes 6% Into Bear Market as SoftBank, Advantest Lead AI Chip Rout in Japan's Worst Day Since 2025," November 6, 2026](https://www.ibtimes.com.au/japan-nikkei-bear-market-ai-stock-selloff-1878028)
6. [Anadolu Agency, "Asian tech stocks plunge on AI spending fears, Japan's Nikkei enters bear market," November 6, 2026](https://www.aa.com.tr/en/economy/asian-tech-stocks-plunge-on-ai-spending-fears-japan-s-nikkei-enters-bear-market/4113600)
7. [ad-hoc-news.de, "Advantest stock heads into IR fireside chat after record half-year," November 9, 2026](https://www.ad-hoc-news.de/boerse/news/corporate-news/advantest-stock-heads-into-ir-fireside-chat-after-record-half-year/70477706)
8. [Teradyne, Inc. press release via Business Wire (Yahoo Finance), "Teradyne Reports Third Quarter 2026 Results," October 27, 2026](https://finance.yahoo.com/markets/stocks/articles/teradyne-reports-third-quarter-2026-203000331.html)
9. [24/7 Wall St., "Teradyne Q3 2026: Six Straight Beats, but the Guidance Is What Moved the Stock," October 28, 2026](https://247wallst.com/cards/teradyne-q3-2026-earnings-ter-01m60ztabhwe15pys2j1erv5ns)
10. [ad-hoc-news.de, "Teradyne stock faces AI sentiment risk as memory outlook holds," November 9, 2026](https://www.ad-hoc-news.de/boerse/news/corporate-news/teradyne-stock-faces-ai-sentiment-risk-as-memory-outlook-holds/70471228)
11. [SemiAnalysis (@SemiAnalysis_), post on the Advantest and Teradyne Q3 FY2026 calls, November 5, 2026](https://x.com/SemiAnalysis_/status/2118412057204654176)


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ChipMOS filed NT$805.5 million in Advantest equipment orders that ran through a two-day, 25% drop — The Inference. Canonical: https://theinference.org/article/chipmos-filed-nt-805-5-million-in-advantest-equipment-orders-that-ran-through-a-two-day-25-drop