What to Compare First When Analysts Revise Their Estimates
Break earnings upgrades into volume, price, costs, taxes, and share count. Compare revisions for the same year and uncover changing assumptions behind an unchanged price target.
Estimate revisions show how new information enters a model. Compare the old and new figures for the same fiscal year and metric, then identify which step between revenue and earnings per share has changed.
Align the basis of the two tables first
Comparing 'next year' in a new report with 'next year' in an older one may mean comparing different years. Fix the calendar year and align the scope of consolidation, currency, and use of adjusted earnings. For next-twelve-month estimates, the included quarters change as time passes. Treating that entire effect as a better business outlook exaggerates the actual upgrade. If the institution or analyst providing the estimates has changed, also distinguish differences between models from revised assumptions within the same model.
Break down changes in revenue, operating profit, and net income
A revenue increase can reflect sales volume, selling prices, exchange rates, or acquisitions. If revenue is unchanged but operating profit rises, look for changes in product mix or cost ratios. If operating profit is unchanged but net income rises, check below-operating-line items such as financial income and expenses, tax rates, or equity-method income. If EPS changes by more, examine weighted-average share count and dilution assumptions too. An estimate-revision table may not explain every cause, so read the related discussion and table footnotes together.
Assess the size and persistence of an upgrade separately
If a large upgrade comes from a one-off disposal gain, do not raise next year's earnings by the same proportion. Conversely, costs may reduce this year's estimate while assumptions of better productivity remain intact. Check whether the cause emphasized in the report affects multiple years in the same direction. Price targets depend on multiples and discount rates as well as earnings, so an earnings upgrade need not coincide with a target increase. Verify new assumptions against disclosed results and business explanations, and do not judge analytical accuracy solely by the direction of a revision.
Worked example
Hypothetical example: If revenue estimates for the same year rise from KRW 100 billion to KRW 105 billion and the operating margin rises from 10% to 12%, operating profit increases 26%, from KRW 10 billion to KRW 12.6 billion. Applying the old margin first gives a revenue-growth effect of KRW 500 million; applying the margin increase to the new revenue gives another KRW 2.1 billion. Stating the decomposition order allows you to reproduce the total KRW 2.6 billion increase. Rather than simply saying that a 5% revenue upgrade raised profit 26%, it is more accurate to note that the changed margin assumption contributed more.
What to check
- Do the old and new estimates cover the same year?
- Have you separated revenue and margin effects?
- Do non-operating factors affect changes in net income and EPS?
- Have you isolated the multiple's effect on the price-target revision?
Sources and primary materials
This is educational material about research methods. For an actual company decision, verify the filings and primary sources for the relevant period.