Key Highlights

  • UMCU fell 13.31% to $22.30 on the October 23 screen, implying a UMC decline of roughly 6.66% (calculated).
  • United Microelectronics closed down 6.51% at $18.53 on Thursday, October 22, and is down 13.41% since October 14 (calculated).
  • The company reports results on October 28.
  • Trailing twelve-month revenue is $7.88 billion, up 5.6%.
  • UMCU charges a 1.49% expense ratio and began trading on August 10, 2026.

UMCU ETF Move: Why Did a 6.51% Fall in UMC Cost the Fund 13.31%?

Tradr 2X Long UMC Daily ETF (CBOE:UMCU) fell 13.31% to $22.30 on the October 23, 2026 screen, which corresponds to Thursday's session for United Microelectronics (NYSE:UMC). The chipmaker's American depositary shares closed down 6.51% at $18.53 on October 22, and doubling that gives 13.02% (calculated). Halving the fund's decline implies a UMC drop of about 6.66%.

The shares had slipped from $21.40 on October 14, with drops of 4.42% that day, 2.24% on October 15 and 5.26% on October 16, before the latest decline. Early Friday quotes showed a modest recovery to about $18.75.

UMC Fundamentals: What Is Behind the Shares and What Do Results Show?

United Microelectronics is a Taiwan-based contract chipmaker that manufactures semiconductors designed by other companies. Its shares trade in the United States as depositary receipts and in Taipei. No company announcement explains the October 22 decline.

Trailing twelve-month revenue is $7.88 billion, up 5.6%. For 2025, revenue was 237.55 billion Taiwan dollars, up 2.26%, while earnings fell 11.64% to 41.72 billion Taiwan dollars. When the shares were near $19.68, market value was about $49.23 billion and the price-to-earnings ratio was 19.87.

The sector backdrop has been unsettled: a memory-chip rout tied to a Chinese memory maker on October 13, a broad AI and technology selloff on October 15, and a drop in chip equipment shares on October 22, when Lam Research (NASDAQ:LRCX) closed down 11.76%, KLA (NASDAQ:KLAC) 9.55% and Applied Materials (NASDAQ:AMAT) 8.16%. UMC's 6.51% decline was smaller than those equipment moves but still large for a company with single-digit revenue growth.

Tradr Fund Terms: How Does a 2x Long Fund on One Foundry Behave?

UMCU began trading on August 10, 2026, and seeks two times the daily performance of UMC's common shares, before fees, with a 1.49% expense ratio. Tradr says it does not pursue that goal over periods other than a single trading day.

Because the target resets daily, a falling week hurts more than simple doubling suggests because each day's loss is applied to a smaller base and the next day's gain starts from that lower level. Compounding UMC's six sessions from October 15 to October 22 at 2x gives about minus 25.71% before fees, against minus 13.41% for the stock measured from the October 14 close (calculated).

October 28 Report: What Will Investors Look For in United Microelectronics' Results?

United Microelectronics reports on October 28, the next company event for the shares and the most important date for UMCU. Investors will compare revenue and margins with the trailing figures above, and they will look for comments on customer demand, pricing and capacity use. The 2025 earnings decline of 11.64% sets a reference point for any recovery in profit.

Moves around results can be sharp in both directions, and UMCU magnifies them by a factor of two for a single day. This article is informational only.