How to Find Low-PER Stocks: A Value Screening Primer
PER (price-to-earnings ratio) is the share price divided by earnings per share. The idea is simple: it tells you how many years of current profit the market is paying for. A PER of 10 means the market value equals ten years of today's earnings.
How low counts as low
There is no absolute rule, but for large Korean stocks a PER of 12 or below is a workable screen, and the InverseOne value screener uses that line. Sector averages differ a lot: high-growth sectors often trade above 30, while mature sectors like banking usually sit below 10.
PER is most powerful inside one sector. If the sector average is 15 and one stock trades at 8, the market is pricing that one stock unusually cheaply, and that gap is the signal worth investigating.
The low-PER trap: cheap has a reason
Not every low-PER stock is a bargain. When the market expects next year's profit to shrink, it lowers the price in advance, which makes the trailing PER look deceptively low. This is the low-PER trap.
Two practical defenses: first, check whether the recent profit was a one-off spike by looking at a few years of history. Second, watch money flow. If a stock is genuinely cheap and recovering, money starts moving in at some point. A low PER overlapping with fresh inflow is the moment worth attention.
Stronger together with PBR
PER measures price against earnings; PBR measures price against net assets. When both are low at once, the stock is cheap by two independent yardsticks. The value component of the InverseOne expectation score checks PER 12 or below together with PBR 1 or below for the same reason.
Frequently asked questions
- What does a negative PER mean?
- The company is losing money, so a price-to-earnings ratio cannot be computed. Use other yardsticks such as PBR or revenue trends instead.
- Where can I check PER?
- Broker apps and finance portals show it, and each InverseOne stock page lists a PER based on public data. Values differ slightly depending on which period's earnings are used.
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