KOSPI and KOSDAQ
The two stock markets run by the Korea Exchange. KOSPI is anchored by large, established blue chips, while KOSDAQ is weighted toward technology and growth companies.
Formula
index = (current total market value / total market value at the base date) × base index value // KOSPI: 100 on 1980-01-04, KOSDAQ: base date 1996-07-01 (now stated on a 1,000 base)
KOSPI and KOSDAQ are both markets run by the Korea Exchange (KRX), but they have different characters. KOSPI is the main board, home to large, long-established companies, while KOSDAQ gathers smaller and venture-stage firms with high growth expectations, many in IT and biotech. The two set different size and listing requirements, so knowing which market a company trades on already hints at what kind of company it is.
KOSPI and KOSDAQ are the names of the markets and of their indexes at the same time. The KOSPI index rolls the combined market value of everything on the main board into a single number, set to 100 on January 4, 1980. When the news says KOSPI rose, it usually means that index, though in everyday speech people also use the word for the market itself. KOSDAQ works the same way, both a market and an index.
The mix of companies differs too. KOSPI holds large manufacturers, financials, and consumer names with big market values, such as Samsung Electronics, while KOSDAQ leans toward smaller technology firms that carry higher growth hopes and, often, sharper price swings. By loose analogy to the U.S., KOSPI is compared to a large-cap index and KOSDAQ to the tech-heavy Nasdaq. Because of that, the two often move apart, with KOSPI up on a day KOSDAQ is down.
That is why it is worth telling them apart. Even within Korean stocks, the market a company lists on shapes its character, its volatility, and the mix of investors who trade it, and it can also set practical rules like trading hours and market holidays. This describes how the markets are structured, not a judgment that one is better than the other.
Example
Large caps like Samsung Electronics and Hyundai Motor list mainly on KOSPI, while smaller tech and biotech firms with high growth hopes list mostly on KOSDAQ. With such different line-ups, the two can diverge on the same day, KOSPI rising while KOSDAQ falls.
How LDBD uses it
LDBD covers direction predictions on U.S. and Korean stocks and ETFs plus crypto. Which market a Korean name lists on, KOSPI or KOSDAQ, sets its ticker, trading hours, and calendar, and LDBD resolves predictions using the Korea Exchange (XKRX) trading-day calendar and a holiday table. Rather than predicting an index itself, LDBD uses the listing market as background about the asset.
FAQ
Which is bigger, KOSPI or KOSDAQ?
By market value and the size of its headline companies, KOSPI is far larger. KOSDAQ lists many companies, but they are mostly smaller, growth-stage firms, so the market as a whole is smaller than KOSPI.
Is KOSPI a market or an index?
It is used for both. Strictly it names the index that represents the whole main board, but in everyday use it also refers to the market itself. KOSDAQ is the same, both a market and an index.