fundFlow · Capital Flow (Deep)

sdk.fundFlow exposes capital-flow data across four dimensions — individual stock / market / rank / sector (source: East Money data center). It returns historical series, ranking boards and sector summaries, as opposed to sdk.quotes.fundFlow, which returns a single-day snapshot batched by code (Tencent, lightweight).

Namespace distinction

• sdk.quotes.fundFlow(codes) — lightweight, single-day capital-flow snapshot batched by code.
• sdk.fundFlow.* — deep (this page): historical, ranking and sector dimensions.

Capital-flow fields follow a uniform main / super-large / large / medium / small order structure. Each tier reports both a net amount (in the listing currency's main unit) and a net ratio (as a percentage number, e.g. 5.2 means 5.2%).

Methods

Method	Description
fundFlow.individual(symbol, opts?)	Per-stock capital-flow history (daily / weekly / monthly)
fundFlow.market()	Market-wide capital-flow history (SSE + SZSE)
fundFlow.rank(opts?)	Per-stock capital-flow ranking (by main net inflow)
fundFlow.sectorRank(opts?)	Sector capital-flow ranking (industry / concept / region)
fundFlow.sectorHistory(symbol, opts?)	Capital-flow history for a single sector

Exact parameters and return fields follow the final implementation; the field tables below reflect the current data contract.

---

fundFlow.individual

Per-stock capital-flow history (daily / weekly / monthly bars).

import { StockSDK } from 'stock-sdk';

const sdk = new StockSDK();

const flow = await sdk.fundFlow.individual('600519', { period: 'daily' });
const latest = flow.at(-1);
console.log(`${latest?.date} main net inflow: ${latest?.mainNetInflow}`);

symbol accepts a bare string (e.g. 'sh600519' / '600519'), resolved fault-tolerantly by normalizeSymbol.

Parameters

Param	Type	Description
symbol	string	Stock code
options.period	'daily' | 'weekly' | 'monthly'	Period, defaults to 'daily'

Returns

StockFundFlowDaily[], sorted by date ascending:

interface StockFundFlowDaily {
  date: string;                          // YYYY-MM-DD
  close: number | null;                  // close price
  changePercent: number | null;          // change (percentage number)
  mainNetInflow: number | null;          // main net inflow amount (currency main unit)
  mainNetInflowPercent: number | null;   // main net inflow ratio (percentage number)
  superLargeNetInflow: number | null;
  superLargeNetInflowPercent: number | null;
  largeNetInflow: number | null;
  largeNetInflowPercent: number | null;
  mediumNetInflow: number | null;
  mediumNetInflowPercent: number | null;
  smallNetInflow: number | null;
  smallNetInflowPercent: number | null;
}

---

fundFlow.market

Market-wide capital-flow history. Each record covers both the SSE Composite and SZSE Component indices.

const market = await sdk.fundFlow.market();
const today = market.at(-1);
console.log(`SSE ${today?.shClose} (${today?.shChangePercent}%)`);
console.log(`main net inflow ${today?.mainNetInflow}`);

Returns

MarketFundFlow[]:

interface MarketFundFlow {
  date: string;
  shClose: number | null;          // SSE Composite close
  shChangePercent: number | null;  // SSE Composite change (percentage number)
  szClose: number | null;          // SZSE Component close
  szChangePercent: number | null;  // SZSE Component change (percentage number)
  mainNetInflow: number | null;
  mainNetInflowPercent: number | null;
  // super-large / large / medium / small follow the same structure (amount + ratio)
}

---

fundFlow.rank

Per-stock capital-flow ranking by main net inflow. changePercent and each tier's net inflow correspond to the chosen indicator window (e.g. 5day returns 5-day figures).

const rank = await sdk.fundFlow.rank({ indicator: '5day' });
rank.slice(0, 10).forEach((item, i) => {
  console.log(`#${i + 1} ${item.name}(${item.code}) main net inflow ${item.mainNetInflow}`);
});

Parameters

Param	Type	Description
options.indicator	'today' | '3day' | '5day' | '10day'	Stat window, defaults to 'today'

Returns

FundFlowRankItem[]:

interface FundFlowRankItem {
  code: string;
  name: string;
  price: number | null;                  // latest price
  changePercent: number | null;          // change for the window (percentage number)
  mainNetInflow: number | null;          // main net inflow amount
  mainNetInflowPercent: number | null;
  superLargeNetInflow: number | null;
  superLargeNetInflowPercent: number | null;
  largeNetInflow: number | null;
  largeNetInflowPercent: number | null;
  mediumNetInflow: number | null;
  mediumNetInflowPercent: number | null;
  smallNetInflow: number | null;
  smallNetInflowPercent: number | null;
}

---

fundFlow.sectorRank

Sector capital-flow ranking across industry / concept / region dimensions.

const sectors = await sdk.fundFlow.sectorRank({
  indicator: 'today',
  sectorType: 'industry',
});
sectors.slice(0, 5).forEach(s => {
  console.log(`${s.name}: net inflow ${s.mainNetInflow}, top stock ${s.topStockName}`);
});

Parameters

Param	Type	Description
options.indicator	'today' | '3day' | '5day' | '10day'	Stat window, defaults to 'today'
options.sectorType	'industry' | 'concept' | 'region'	Sector dimension, defaults to 'industry'

Returns

SectorFundFlowItem[]:

interface SectorFundFlowItem {
  code: string;                  // sector code (East Money BK id, e.g. BK0475)
  name: string;                  // sector name
  changePercent: number | null;  // percentage number
  mainNetInflow: number | null;  // main net inflow amount
  mainNetInflowPercent: number | null;
  superLargeNetInflow: number | null;
  largeNetInflow: number | null;
  mediumNetInflow: number | null;
  smallNetInflow: number | null;
  topStockName?: string;         // name of the top main-inflow stock
  topStockCode?: string;         // code of the top main-inflow stock
}

---

fundFlow.sectorHistory

Capital-flow history for a single sector. symbol accepts a BK id (e.g. BK0475) or a prefixed East Money secid (e.g. 90.BK0475).

const banking = await sdk.fundFlow.sectorHistory('BK0475');
console.log(`banking sector history: ${banking.length} records`);

Parameters

Param	Type	Description
symbol	string	Sector code (BK id or East Money secid)
options.period	'daily' | 'weekly' | 'monthly'	Period, defaults to 'daily'

Returns

StockFundFlowDaily[], identical in shape to fundFlow.individual (here close / changePercent refer to the sector itself).