Why disclosures are the most important information

News, online communities and broker reports are all information someone has already interpreted. A disclosure is first-hand information a company publishes itself as required by law, and the company and its executives are liable if it is wrong or incomplete. Disclosures by Korean listed companies are open to everyone on the Financial Supervisory Service’s electronic disclosure system (DART) and the exchange’s disclosure system (KIND).

Important information must not spread through the market before it is disclosed. Trading on material non-public information learned before disclosure is illegal (insider trading), and companies are also banned from giving information early to selected people (the fair disclosure rule).

Types of disclosure and deadlines

TypeContentWhen
Periodic disclosureAnnual business report, half-year and quarterly reportsAnnual report within 90 days of the fiscal year end; half-year and quarterly within 45 days
Major event reportRights offerings, convertible bond issues, mergers and splits, business transfers, share buybacks, etc.By the day after the event
Exchange timely disclosureSingle sales or supply contracts, change of largest shareholder, lawsuits, production halts, etc.Usually the same or next day
Fair disclosurePreliminary earnings, guidance, investor relations (IR) contentBefore or at the same time as telling outsiders
Inquiry disclosureThe exchange asks whether rumors, reports or sharp moves are trueAnswer within the required deadline
Ownership disclosureHoldings of 5% or more, changes in holdings by executives and major shareholdersUsually within 5 business days

Reading preliminary earnings disclosures

After a quarter ends, a company publishes its preliminary operating results as a fair disclosure, before the formal quarterly report. What matters is less the size of the numbers than what they are compared with.

Results look different depending on the comparison (example)

Operating profit of ₩120 billion is 33% higher than the same quarter last year (₩90 billion) but 11% below market expectations (₩135 billion). Prices usually react to the gap from expectations.

Major event reports: share issues, convertible bonds, mergers

What to check in a rights offering disclosure

  1. Allocation method: to shareholders, public offering, or third-party allotment. With a third-party allotment, who is buying is the key.
  2. Issue price and discount: how much below the market price the shares are issued. The bigger the discount, the bigger the loss for existing shareholders.
  3. Use of proceeds: capital spending, working capital, debt repayment or acquiring another company. If “debt repayment” keeps repeating, it may signal financial strain.
  4. The share of new shares: work out what percentage of existing shares they are.

What to check in convertible bond (CB) and bond-with-warrant (BW) disclosures

What to check in merger and split disclosures

Check how the merger ratio was set (for listed companies, on the market-price basis set by law), the price and period of appraisal rights that let opposing shareholders ask the company to buy their shares, and, for a split, whether it is a spin-off or a split-off into a subsidiary (chapter 1).

The order for reading a rights offering disclosure

  1. 1Allocation methodShareholders, public or third party
  2. 2DiscountHow far below market?
  3. 3Use of proceedsInvestment or paying debt?
  4. 4New sharesWhat % of existing shares?

Ownership disclosures: the 5% report and insider trades

Audit opinions and going-concern uncertainty

The external auditor gives one of four opinions on the financial statements in the annual report.

Audit opinionMeaningEffect on listing (summary)
UnqualifiedThe statements are prepared in line with accounting standardsNormal
QualifiedSome items have problems or could not be verifiedKOSPI: designated an administrative issue; KOSDAQ: may be grounds for delisting (sometimes with a grace period)
AdverseThe statements are distorted as a wholeGrounds for delisting
DisclaimerThe audit itself could not be carried outGrounds for delisting

The order for reading disclosures

  1. Skim the list of disclosures over the last one or two years to see whether rights offerings, CB issues, changes of largest shareholder or lawsuits keep repeating. The list alone reveals a lot about a company’s character.
  2. In the “business overview” of the annual report, read what the company makes money from, its main customers and raw materials, and the competitive situation.
  3. In the financial statements and notes, look at sales, profit, cash flow, debt maturities and related-party transactions (chapter 6).
  4. Check the ownership structure (largest shareholder, 5% holders, treasury shares) and the dividend policy.
  5. If there are amended disclosures, compare what changed. A company whose numbers are amended often may have weak internal controls.

The reading order at a glance

  1. Recent disclosuresRepeated issues, CBs, lawsuits?
  2. Business overviewHow does it make money?
  3. Statements and notesCash flow and debt
  4. OwnershipLargest holder, treasury shares
  5. AmendmentsWhat changed?

Reading broker reports and consensus

Analyst reports from brokers are secondary material interpreting disclosures. They contain industry structure, peer comparisons and earnings models and help a lot with study, but there are a few things to know when reading them.

What to check in buyback and dividend disclosures

In shareholder return disclosures, “how” matters more than “how much”.

DisclosureWhat to check
Decision to buy back sharesDirect purchase or a trust contract, the buying period, and whether cancellation is planned. With a trust contract the actual amount bought can be smaller than disclosed
Decision to cancel treasury sharesNumber of shares cancelled and the share of shares issued. Only cancellation surely increases the remaining shareholders’ stakes
Decision to dispose of treasury sharesTo whom and at what price they are sold. Used for employee compensation or exchangeable bonds, it is effectively dilution
Cash dividend decisionDividend per share, record date, payout ratio (dividends relative to net income), and whether dividends are quarterly

What makes up a 5% shareholder yield (example)

If a company with a ₩1 trillion market cap pays ₩30 billion in dividends and buys back and cancels ₩20 billion of shares, its shareholder yield is 5%.

This chapter reflects the situation as of October 2026. Trading rules, tax rates and fees can change, so check with the exchange, the tax authority or your broker before you trade or file. Parts marked “to be confirmed” are especially likely to change. This is learning material and does not recommend any stock or trade.

Textbook contents · Glossary