---
symbol: "UMC"
name: "UMC"
date: 2026-11-13
change_pct: -3.671638018200199
direction: "down"
event_type: "theme_sympathy"
url: "https://perplo.app/why/UMC/2026-11-13"
updated_at: 2026-11-13T22:07:16.353Z
---

# Why UMC (UMC) fell 3.67% on November 13, 2026

UMC (UMC) fell 3.67% on November 13, 2026 — Chip supply-chain selloff drags foundry peers.

## What happened

UMC fell 3.7% in the Chip Supply Chain selloff, as Nvidia's slide led chipmaker weakness across the broader market. The move came with the group.

## Why it moved

As a mature-node foundry, UMC trades on general semiconductor sentiment and shared demand conditions. When the complex sells off together, foundry names follow.

## Why it matters

UMC is a foundry participant in the Chip Supply Chain theme, so its move reflects the theme's foundry-level beta to the AI-capex cycle.

## What would break the thesis

Foundry names often recover with chip sentiment, but if mature-node utilization weakens, UMC could decouple to the downside. A broad semis rebound would be the likely near-term reversal.

## Sources

- [S&P 500 SLIPS AS CHIPMAKER WEAKNESS OVERSHADOWS INFLATION DATA – US MARKET WRAP](https://t.me/marketfeed/1077595) — MarketFeed

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