Stock Analysis

The three-year decline in earnings might be taking its toll on YEST (KOSDAQ:122640) shareholders as stock falls 11% over the past week

YEST Co., Ltd. (KOSDAQ:122640) shareholders might be concerned after seeing the share price drop 15% in the last month. But don't let that distract from the very nice return generated over three years. In the last three years the share price is up, 98%: better than the market.

Although YEST has shed ₩41b from its market cap this week, let's take a look at its longer term fundamental trends and see if they've driven returns.

While the efficient markets hypothesis continues to be taught by some, it has been proven that markets are over-reactive dynamic systems, and investors are not always rational. One way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

During three years of share price growth, YEST moved from a loss to profitability. That would generally be considered a positive, so we'd expect the share price to be up.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

earnings-per-share-growth
KOSDAQ:A122640 Earnings Per Share Growth December 3rd 2025

We know that YEST has improved its bottom line lately, but is it going to grow revenue? This free report showing analyst revenue forecasts should help you figure out if the EPS growth can be sustained.

Advertisement

A Different Perspective

We're pleased to report that YEST shareholders have received a total shareholder return of 91% over one year. Since the one-year TSR is better than the five-year TSR (the latter coming in at 11% per year), it would seem that the stock's performance has improved in recent times. In the best case scenario, this may hint at some real business momentum, implying that now could be a great time to delve deeper. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. For example, we've discovered 2 warning signs for YEST that you should be aware of before investing here.

We will like YEST better if we see some big insider buys. While we wait, check out this free list of undervalued stocks (mostly small caps) with considerable, recent, insider buying.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on South Korean exchanges.

New: Manage All Your Stock Portfolios in One Place

We've created the ultimate portfolio companion for stock investors, and it's free.

• Connect an unlimited number of Portfolios and see your total in one currency
• Be alerted to new Warning Signs or Risks via email or mobile
• Track the Fair Value of your stocks

Try a Demo Portfolio for Free

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

About KOSDAQ:A122640

YEST

Engages in the manufacture and sale of semiconductors and display manufacturing equipment in Korea and internationally.

Excellent balance sheet and slightly overvalued.

Advertisement

Weekly Picks

RO
RockeTeller
SCZ logo
RockeTeller on Santacruz Silver Mining ·

Crazy Undervalued 42 Baggers Silver Play (Active & Running Mine)

Fair Value:CA$8696.7% undervalued
32 users have followed this narrative
6 users have commented on this narrative
9 users have liked this narrative
RO
Robbo
FID logo
Robbo on Fiducian Group ·

Fiducian: Compliance Clouds or Value Opportunity?

Fair Value:AU$126.1% undervalued
4 users have followed this narrative
0 users have commented on this narrative
0 users have liked this narrative
WO
WVVI logo
woodworthfund on Willamette Valley Vineyards ·

Willamette Valley Vineyards (WVVI): Not-So-Great Value

Fair Value:US$242.5% overvalued
6 users have followed this narrative
0 users have commented on this narrative
1 users have liked this narrative

Updated Narratives

MA
MarkoVT
GOOGL logo
MarkoVT on Alphabet ·

Positioned globally, partnered locally

Fair Value:US$390.1919.1% undervalued
1 users have followed this narrative
0 users have commented on this narrative
0 users have liked this narrative
JO
JohnJ
WLN logo
JohnJ on Worldline ·

When will fraudsters be investigated in depth. Fraud was ongoing in France too.

Fair Value:€0.5190.0% overvalued
1 users have followed this narrative
0 users have commented on this narrative
0 users have liked this narrative
MA
MarkoVT
APLD logo
MarkoVT on Applied Digital ·

Staggered by dilution; positions for growth

Fair Value:US$35.4520.9% undervalued
5 users have followed this narrative
0 users have commented on this narrative
0 users have liked this narrative

Popular Narratives

TH
TheWallstreetKing
MVIS logo
TheWallstreetKing on MicroVision ·

MicroVision will explode future revenue by 380.37% with a vision towards success

Fair Value:US$6098.6% undervalued
112 users have followed this narrative
11 users have commented on this narrative
22 users have liked this narrative
AN
AnalystConsensusTarget
NVDA logo
AnalystConsensusTarget on NVIDIA ·

NVDA: Expanding AI Demand Will Drive Major Data Center Investments Through 2026

Fair Value:US$250.3927.5% undervalued
950 users have followed this narrative
6 users have commented on this narrative
25 users have liked this narrative
OS
oscargarcia
GOOGL logo
oscargarcia on Alphabet ·

The company that turned a verb into a global necessity and basically runs the modern internet, digital ads, smartphones, maps, and AI.

Fair Value:US$3407.1% undervalued
148 users have followed this narrative
6 users have commented on this narrative
18 users have liked this narrative