What 52-week highs and lows are
A 52-week high is a price the stock has not reached at any point in the past 52 weeks, roughly a year, and a 52-week low is the opposite. A year is used because it covers a full cycle of seasonal moves and earnings reports, which makes it better for seeing the longer trend than short-term noise. The term shows up constantly on quote screens and in the news, but it is more accurate to treat it not as a single number but as location information: where today's price sits within the past year's range.
Why the value differs between screens
The same stock can show a slightly different 52-week high on different quote screens. Most of the time the difference comes from how it is calculated.
- Whether it uses intraday highs and lows or daily closes
- Whether it counts only the regular session or, for US stocks, pre-market and after-hours prices too
- Whether past prices have been adjusted for splits and dividends
- Whether the 52 weeks are cut by calendar date or by number of trading days
An order for reading the chart near a new high
A new high also means nobody bought at that price in the past year. With no overhead supply, the price sometimes moves lightly, but because the level is new, profit-taking often piles in and pushes it back. So rather than one moment's number, it matters to look at what surrounds it, step by step.
- Check whether it only poked above intraday or also closed above the level
- Check whether volume on the breakout day was higher than usual
- Check how long the price moved sideways before reaching the previous high
- Check whether the index and stocks in the same sector are also near new highs
What a new low tells you, and what it does not
A 52-week low means everyone who bought above that price in the past year is sitting on a loss. Each bounce can bring out sellers looking to get their money back, so moving higher tends to get heavy. A common mistake is to read a new low as a sign that the stock is cheap. It is only the lowest price of the year; it does not mean cheap relative to the company's value, and if it fell because earnings or business conditions worsened, new lows can keep coming. Reading a new low as a sure sign that the fall is over is equally baseless. The first step is to look for the cause in earnings, filings and the sector trend.
Reading it within the index and sector
A stock's new high means one thing when the index is rising with it and another when the index is going sideways. A stock that rose alongside an index at a record may simply be riding the market, while one that hits a new high while the index is weak may be relatively strong. Even for the market as a whole, the index alone makes it hard to tell whether a record was pushed up by a handful of large caps. Looking at whether many or few stocks are near new highs, and whether they are spread across sectors, gives you a sense of how broad the move is.
How Korean and US stocks differ
Korean stocks have a daily price limit that caps how far they can move in a day, while individual US stocks have no daily price limit. So a US stock can set a new high or low in a single large gap the day after earnings. For US stocks, the day a new high appears can also look different depending on whether extended-hours trading is included in the chart. Keep these differences in mind when comparing Korean large caps such as Samsung Electronics and SK Hynix with large US tech stocks on the same screen.
Check it with this site's live tools
The Korea and US large-cap scanner shows, in one table, how far each large cap sits below its 52-week high, along with volume and moving average alignment, and lets you filter for stocks near their 52-week high. The world markets overview shows where each index, currency and commodity sits within its 52-week range. Put a stock that hit a new high into the stock comparison tool with its index, both started at 100 on the same day, to check whether it outperformed. Prices may be delayed.
Things to keep in mind
This guide explains how to read 52-week highs and lows on a chart; it is not investment advice. A new high is no promise of further gains, and a new low is no signal of a bottom. The stocks mentioned are examples of chart reading only, not suggestions to buy or sell. The basis for calculating the 52-week range can differ between data providers, so check your broker's screen and official information before trading.
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