diff --git a/pykis/api/stock/investor.py b/pykis/api/stock/investor.py
new file mode 100644
index 00000000..d101c922
--- /dev/null
+++ b/pykis/api/stock/investor.py
@@ -0,0 +1,205 @@
+"""투자자별 매매동향 조회 API"""
+
+from decimal import Decimal
+from typing import TYPE_CHECKING, List, Protocol, runtime_checkable
+
+from pykis.responses.dynamic import KisDynamic, KisList
+from pykis.responses.response import KisAPIResponse
+from pykis.responses.types import KisDecimal, KisInt, KisString
+from pykis.utils.repr import kis_repr
+
+if TYPE_CHECKING:
+    from pykis.kis import PyKis
+
+__all__ = [
+    "KisInvestorItem",
+    "KisInvestorResponse",
+    "investor",
+]
+
+
+@runtime_checkable
+class KisInvestorItem(Protocol):
+    """투자자별 매매동향 일별 데이터"""
+
+    @property
+    def date(self) -> str:
+        """영업일자"""
+        ...
+
+    @property
+    def close(self) -> Decimal | None:
+        """종가"""
+        ...
+
+    @property
+    def change(self) -> Decimal | None:
+        """전일대비"""
+        ...
+
+    @property
+    def change_rate(self) -> Decimal | None:
+        """등락률"""
+        ...
+
+    @property
+    def foreign_net(self) -> int | None:
+        """외국인 순매수"""
+        ...
+
+    @property
+    def institution_net(self) -> int | None:
+        """기관 순매수"""
+        ...
+
+    @property
+    def individual_net(self) -> int | None:
+        """개인 순매수"""
+        ...
+
+
+@kis_repr(
+    "date",
+    "close",
+    "change_rate",
+    "foreign_net",
+    "institution_net",
+    "individual_net",
+    lines="multiple",
+)
+class KisInvestorItemImpl(KisDynamic):
+    """투자자별 매매동향 일별 데이터 구현"""
+
+    __ignore_missing__ = True
+
+    date: str = KisString["stck_bsop_date"]
+    """영업일자 (YYYYMMDD)"""
+
+    close: Decimal | None = KisDecimal["stck_clpr"]
+    """종가"""
+
+    change: Decimal | None = KisDecimal["prdy_vrss"]
+    """전일대비"""
+
+    change_rate: Decimal | None = KisDecimal["prdy_ctrt"]
+    """등락률"""
+
+    foreign_net: int | None = KisInt["frgn_ntby_qty"]
+    """외국인 순매수 수량"""
+
+    institution_net: int | None = KisInt["orgn_ntby_qty"]
+    """기관 순매수 수량"""
+
+    individual_net: int | None = KisInt["prsn_ntby_qty"]
+    """개인 순매수 수량"""
+
+
+@runtime_checkable
+class KisInvestorResponse(Protocol):
+    """투자자별 매매동향 응답"""
+
+    @property
+    def symbol(self) -> str:
+        """종목코드"""
+        ...
+
+    @property
+    def items(self) -> List[KisInvestorItem]:
+        """일별 매매동향 리스트"""
+        ...
+
+    @property
+    def foreign_total(self) -> int:
+        """외국인 순매수 합계"""
+        ...
+
+    @property
+    def institution_total(self) -> int:
+        """기관 순매수 합계"""
+        ...
+
+    @property
+    def individual_total(self) -> int:
+        """개인 순매수 합계"""
+        ...
+
+
+@kis_repr(
+    "symbol",
+    "foreign_total",
+    "institution_total",
+    "individual_total",
+    lines="multiple",
+)
+class KisDomesticInvestor(KisAPIResponse):
+    """한국투자증권 국내 주식 투자자별 매매동향"""
+
+    __path__ = None
+
+    symbol: str
+    """종목코드"""
+
+    items: List[KisInvestorItemImpl] = KisList(KisInvestorItemImpl)["output"]
+    """일별 매매동향 리스트"""
+
+    def __init__(self, symbol: str):
+        super().__init__()
+        self.symbol = symbol
+
+    @property
+    def foreign_total(self) -> int:
+        """외국인 순매수 합계"""
+        return sum(item.foreign_net or 0 for item in self.items)
+
+    @property
+    def institution_total(self) -> int:
+        """기관 순매수 합계"""
+        return sum(item.institution_net or 0 for item in self.items)
+
+    @property
+    def individual_total(self) -> int:
+        """개인 순매수 합계"""
+        return sum(item.individual_net or 0 for item in self.items)
+
+
+def investor(
+    self: "PyKis",
+    symbol: str,
+) -> KisDomesticInvestor:
+    """
+    한국투자증권 국내 주식 투자자별 매매동향 조회
+
+    외국인, 기관, 개인의 일별 순매수 수량을 조회합니다.
+
+    국내주식시세 -> 종목별투자자[v1_국내주식-019]
+
+    Args:
+        symbol (str): 종목코드
+
+    Returns:
+        KisDomesticInvestor: 투자자별 매매동향 데이터
+
+    Raises:
+        KisAPIError: API 호출에 실패한 경우
+        ValueError: 종목 코드가 올바르지 않은 경우
+
+    Examples:
+        >>> kis = PyKis(...)
+        >>> result = kis.investor("005930")
+        >>> print(f"외국인 순매수: {result.foreign_total:,}")
+        >>> for item in result.items[:5]:
+        ...     print(f"{item.date}: 외국인 {item.foreign_net:+,}")
+    """
+    if not symbol:
+        raise ValueError("종목코드를 입력해주세요.")
+
+    return self.fetch(
+        "/uapi/domestic-stock/v1/quotations/inquire-investor",
+        api="FHKST01010900",
+        params={
+            "FID_COND_MRKT_DIV_CODE": "J",
+            "FID_INPUT_ISCD": symbol,
+        },
+        response_type=KisDomesticInvestor(symbol),
+        domain="real",
+    )
diff --git a/pykis/api/stock/ranking.py b/pykis/api/stock/ranking.py
new file mode 100644
index 00000000..159920f4
--- /dev/null
+++ b/pykis/api/stock/ranking.py
@@ -0,0 +1,294 @@
+"""주식 순위 조회 API (시가총액, 거래량, 등락률)"""
+
+from decimal import Decimal
+from typing import TYPE_CHECKING, List, Literal, Protocol, runtime_checkable
+
+from pykis.responses.dynamic import KisDynamic, KisList
+from pykis.responses.response import KisAPIResponse
+from pykis.responses.types import KisDecimal, KisInt, KisString
+from pykis.utils.repr import kis_repr
+
+if TYPE_CHECKING:
+    from pykis.kis import PyKis
+
+__all__ = [
+    "KisRankingItem",
+    "KisRankingResponse",
+    "ranking_market_cap",
+    "ranking_volume",
+    "ranking_fluctuation",
+]
+
+# 시장 구분 코드
+MARKET_CODE = Literal["J", "Q", "K"]  # J: 코스피, Q: 코스닥, K: 코넥스
+
+
+@runtime_checkable
+class KisRankingItem(Protocol):
+    """순위 항목"""
+
+    @property
+    def rank(self) -> int:
+        """순위"""
+        ...
+
+    @property
+    def symbol(self) -> str:
+        """종목코드"""
+        ...
+
+    @property
+    def name(self) -> str:
+        """종목명"""
+        ...
+
+    @property
+    def price(self) -> Decimal:
+        """현재가"""
+        ...
+
+    @property
+    def change(self) -> Decimal:
+        """전일대비"""
+        ...
+
+    @property
+    def change_sign(self) -> str:
+        """전일대비부호 (1:상한, 2:상승, 3:보합, 4:하한, 5:하락)"""
+        ...
+
+    @property
+    def change_rate(self) -> Decimal:
+        """등락률"""
+        ...
+
+    @property
+    def volume(self) -> int:
+        """누적거래량"""
+        ...
+
+    @property
+    def trading_value(self) -> Decimal:
+        """누적거래대금"""
+        ...
+
+    @property
+    def listed_shares(self) -> int:
+        """상장주수"""
+        ...
+
+
+@kis_repr(
+    "rank",
+    "symbol",
+    "name",
+    "price",
+    "change_rate",
+    "volume",
+    lines="multiple",
+)
+class KisRankingItemImpl(KisDynamic):
+    """순위 항목 구현"""
+
+    __ignore_missing__ = True
+
+    rank: int = KisInt["data_rank"]
+    """순위"""
+
+    symbol: str = KisString["mksc_shrn_iscd"]
+    """종목코드"""
+
+    name: str = KisString["hts_kor_isnm"]
+    """종목명"""
+
+    price: Decimal | None = KisDecimal["stck_prpr"]
+    """현재가"""
+
+    change: Decimal | None = KisDecimal["prdy_vrss"]
+    """전일대비"""
+
+    change_sign: str = KisString["prdy_vrss_sign"]
+    """전일대비부호 (1:상한, 2:상승, 3:보합, 4:하한, 5:하락)"""
+
+    change_rate: Decimal | None = KisDecimal["prdy_ctrt"]
+    """등락률"""
+
+    volume: int | None = KisInt["acml_vol"]
+    """누적거래량"""
+
+    prev_volume: int | None = KisInt["prdy_vol"]
+    """전일거래량"""
+
+    trading_value: Decimal | None = KisDecimal["acml_tr_pbmn"]
+    """누적거래대금"""
+
+    listed_shares: int | None = KisInt["lstn_stcn"]
+    """상장주수"""
+
+    volume_rate: Decimal | None = KisDecimal["vol_inrt"]
+    """거래량증가율"""
+
+    turnover_rate: Decimal | None = KisDecimal["vol_tnrt"]
+    """거래회전율"""
+
+
+@runtime_checkable
+class KisRankingResponse(Protocol):
+    """순위 응답"""
+
+    @property
+    def market(self) -> str:
+        """시장구분"""
+        ...
+
+    @property
+    def ranking_type(self) -> str:
+        """순위유형"""
+        ...
+
+    @property
+    def items(self) -> List[KisRankingItem]:
+        """순위 리스트"""
+        ...
+
+
+@kis_repr(
+    "market",
+    "ranking_type",
+    lines="multiple",
+)
+class KisRanking(KisAPIResponse):
+    """한국투자증권 주식 순위 조회"""
+
+    __path__ = None
+
+    market: str
+    """시장구분 (J:코스피, Q:코스닥, K:코넥스)"""
+
+    ranking_type: str
+    """순위유형"""
+
+    items: List[KisRankingItemImpl] = KisList(KisRankingItemImpl)["output"]
+    """순위 리스트"""
+
+    def __init__(self, market: str, ranking_type: str):
+        super().__init__()
+        self.market = market
+        self.ranking_type = ranking_type
+
+
+def _fetch_ranking(
+    kis: "PyKis",
+    market: MARKET_CODE,
+    scr_div_code: str,
+    ranking_type: str,
+    target_cls_code: str = "111111111",
+    exclude_cls_code: str = "000000",
+) -> KisRanking:
+    """순위 조회 공통 함수"""
+    return kis.fetch(
+        "/uapi/domestic-stock/v1/ranking/market-cap",
+        api="FHPST01710000",
+        params={
+            "FID_COND_MRKT_DIV_CODE": market,
+            "FID_COND_SCR_DIV_CODE": scr_div_code,
+            "FID_INPUT_ISCD": "0000",
+            "FID_DIV_CLS_CODE": "0",
+            "FID_BLNG_CLS_CODE": "0",
+            "FID_TRGT_CLS_CODE": target_cls_code,
+            "FID_TRGT_EXLS_CLS_CODE": exclude_cls_code,
+            "FID_INPUT_PRICE_1": "",
+            "FID_INPUT_PRICE_2": "",
+            "FID_VOL_CNT": "",
+            "FID_INPUT_DATE_1": "",
+        },
+        response_type=KisRanking(market, ranking_type),
+        domain="real",
+    )
+
+
+def ranking_market_cap(
+    self: "PyKis",
+    market: MARKET_CODE = "J",
+) -> KisRanking:
+    """
+    한국투자증권 시가총액 순위 조회
+
+    시가총액 기준 상위 종목을 조회합니다.
+
+    국내주식시세 -> 국내주식 시가총액순위[v1_국내주식-047]
+
+    Args:
+        market: 시장구분 (J:코스피, Q:코스닥, K:코넥스)
+
+    Returns:
+        KisRanking: 시가총액 순위 데이터
+
+    Raises:
+        KisAPIError: API 호출에 실패한 경우
+
+    Examples:
+        >>> kis = PyKis(...)
+        >>> result = kis.ranking_market_cap()
+        >>> for item in result.items[:10]:
+        ...     print(f"{item.rank}. {item.name} ({item.symbol})")
+    """
+    return _fetch_ranking(self, market, "20174", "시가총액")
+
+
+def ranking_volume(
+    self: "PyKis",
+    market: MARKET_CODE = "J",
+) -> KisRanking:
+    """
+    한국투자증권 거래량 순위 조회
+
+    거래량 기준 상위 종목을 조회합니다.
+
+    국내주식시세 -> 국내주식 거래량순위[v1_국내주식-047]
+
+    Args:
+        market: 시장구분 (J:코스피, Q:코스닥, K:코넥스)
+
+    Returns:
+        KisRanking: 거래량 순위 데이터
+
+    Raises:
+        KisAPIError: API 호출에 실패한 경우
+
+    Examples:
+        >>> kis = PyKis(...)
+        >>> result = kis.ranking_volume()
+        >>> for item in result.items[:10]:
+        ...     print(f"{item.rank}. {item.name}: {item.volume:,}주")
+    """
+    return _fetch_ranking(self, market, "20171", "거래량")
+
+
+def ranking_fluctuation(
+    self: "PyKis",
+    market: MARKET_CODE = "J",
+) -> KisRanking:
+    """
+    한국투자증권 등락률 순위 조회
+
+    등락률(상승률) 기준 상위 종목을 조회합니다.
+
+    국내주식시세 -> 국내주식 등락률순위[v1_국내주식-047]
+
+    Args:
+        market: 시장구분 (J:코스피, Q:코스닥, K:코넥스)
+
+    Returns:
+        KisRanking: 등락률 순위 데이터
+
+    Raises:
+        KisAPIError: API 호출에 실패한 경우
+
+    Examples:
+        >>> kis = PyKis(...)
+        >>> result = kis.ranking_fluctuation()
+        >>> for item in result.items[:10]:
+        ...     print(f"{item.rank}. {item.name}: {item.change_rate:+.2f}%")
+    """
+    return _fetch_ranking(self, market, "20170", "등락률")
diff --git a/pykis/kis.py b/pykis/kis.py
index acd36acd..8b89c542 100644
--- a/pykis/kis.py
+++ b/pykis/kis.py
@@ -751,3 +751,5 @@ def __del__(self) -> None:
     from pykis.api.stock.trading_hours import trading_hours
     from pykis.scope.account import account
     from pykis.scope.stock import stock
+    from pykis.api.stock.investor import investor
+    from pykis.api.stock.ranking import ranking_market_cap, ranking_volume, ranking_fluctuation