SeoulMarkets · tag
data-quality
6 stories tagged “data-quality”, each from official Korean data with its source and timestamp.
An Analyst 'Leaderboard' We Called Ranked Turned Out to Be Alphabetical
We published an article calling an analyst Korea's '#1-ranked' by score. The rank field we read was sorting 74 names alphabetically, not by performance. We're correcting it and showing how we caught it.
One broker's target price fell 75 percent overnight. It was a stock split, not a downgrade.
Of 53 target-price revisions filed on September 21, one showed a 75% overnight cut. The company's shares had been split 4-for-1 five weeks earlier — the number was arithmetic, not a bearish call.
The Same Analyst Dataset That Mislabeled a Rank Would Also Let You Rank Firms on 3 Data Points
Grouping the September 18 analyst snapshot by brokerage firm gives averages from 16.7% to 54.2% accuracy. The lowest belongs to the firm of the analyst our earlier article wrongly called 'ranked #1' — driven by a three-person sample.
Six Korean retail bonds showed yields between −424 percent and +35 percent in one day's data
Among 350 bonds in KRX's general and small-lot bond markets on September 17, six posted yields no real bond earns — a byproduct of trades as small as 10,000 won face value setting the day's quoted price.
Korea's 2026 trade surplus 'tripled.' We don't buy it.
Korea's trade surplus seems to jump 5x in a year. But exports step up 29% in one month while every partner keeps its share — a measurement break, not a boom.
One in three Korean listed companies files its headcount in pieces. Forty-two add it up.
The employee table in a Korean annual report carries no required total. Read only the first row — as we did until yesterday — and 482,227 people disappear from a sample of 853,817.