KRX Stock CLI

Zero-config CLI for Korean Exchange (KRX) market data: daily OHLCV, latest-close snapshots, market-cap rankings, index histories, and ticker lookups for KOSPI / KOSDAQ / KONEX / ETF tickers.

Backed by FinanceDataReader, which aggregates KRX, Naver Finance, and related public sources. No API key required.

When to use

Trigger on:

• Korean stock price / OHLCV requests ("삼성전자 주가", "005930 price history")
• Market-cap ranking / latest close snapshots
• Index series (KOSPI, KOSDAQ, KOSPI 200, KRX 100)
• Ticker ↔ company-name resolution
• Company name substring search
• Global-index tagalong queries (S&P 500, Nasdaq, Nikkei, Shanghai)

Do not use for:

• Corporate filings / disclosures → use opendart-cli
• Fundamentals per day (PER/PBR/EPS) — not exposed; use DART financial statements instead
• Real-time ticks / order book (data is EOD; today's bar is available after market close)

Install

pip install -r scripts/requirements.txt

Dependencies: finance-datareader, pandas.

Usage

All commands are sub-commands of scripts/krx.py. JSON by default; pass --csv for CSV to stdout.

Dates accept either YYYYMMDD or YYYY-MM-DD.

Ticker lookup

python scripts/krx.py ticker 005930            # → 삼성전자
python scripts/krx.py ticker "SK하이닉스"       # → 000660
python scripts/krx.py search 카카오 --top 5     # substring search

OHLCV

python scripts/krx.py ohlcv 005930 --days 30
python scripts/krx.py ohlcv 005930 --start 20260101 --end 20260420 --csv

Latest-close snapshot

python scripts/krx.py snapshot 005930

Market-cap ranking

python scripts/krx.py marketcap --market KRX --top 50
python scripts/krx.py marketcap --market KOSDAQ --top 20 --csv

--market accepts KRX, KOSPI, KOSDAQ, KONEX, ETF/KR.

List all tickers in a market

python scripts/krx.py list --market KOSPI --top 100

Index

python scripts/krx.py index KS11 --days 90       # KOSPI
python scripts/krx.py index KS200 --days 30      # KOSPI 200
python scripts/krx.py index IXIC --days 30       # NASDAQ Composite
python scripts/krx.py index-list                 # common codes

Common codes: KS11 KOSPI · KQ11 KOSDAQ · KS200 KOSPI 200 · KRX100 KRX 100 · DJI Dow · IXIC Nasdaq · US500 S&P 500 · N225 Nikkei 225 · SSEC Shanghai.

Output format

• JSON (default): array of records, UTF-8, Korean preserved, dates as YYYY-MM-DD.
• CSV (--csv): Pandas-compatible; date is the first column on time-series output.

Error handling

• Invalid ticker → exit code 2, {"error":"ticker_not_found","input":"…"} on stderr.
• Upstream error (network, schema drift) → exit code 3, {"error":"upstream_error",…} on stderr.
• Empty date range (weekend / holiday) → empty array, exit code 0.

Rate limits

Public endpoints — keep multi-ticker jobs to ~1 req/sec and back off on 403.

See also

• opendart-cli — DART filings & financial statements
• toss-payments-cli — Toss Payments API
• naver-papago-translate — translate Korean disclosures

License

MIT. No warranty on data accuracy — always verify against the official KRX disclosure before trading.