TypeScript 量子经济学：市场影响类型实现

            
interface MarketImpact {
  assetSymbol: string;
  tradeSize: number;
  priceBeforeTrade: number;
  priceAfterTrade: number;
  impactPercentage: number;
  timestamp: Date;
  source: string; // e.g., 'Exchange A', 'Order Book'
}

// Example Function to Calculate Market Impact
function calculateMarketImpact(trade: {
  assetSymbol: string;
  tradeSize: number;
  price: number;
  orderBookDepth: number; // Example parameter, can include other order book data
}): MarketImpact {
  // Simulate or calculate impact (example: simplified)
  const impactPercentage = Math.min(0.01, trade.tradeSize / trade.orderBookDepth);
  const priceChange = trade.price * impactPercentage;
  const priceAfterTrade = trade.price + priceChange;

  return {
    assetSymbol: trade.assetSymbol,
    tradeSize: trade.tradeSize,
    priceBeforeTrade: trade.price,
    priceAfterTrade: priceAfterTrade,
    impactPercentage: impactPercentage,
    timestamp: new Date(),
    source: 'Simulated Market'
  };
}

// Example Usage
const tradeData = {
  assetSymbol: 'AAPL',
  tradeSize: 1000,
  price: 175.00,
  orderBookDepth: 100000 // Sample data for order book depth
};

const impact: MarketImpact = calculateMarketImpact(tradeData);
console.log(impact);

            

              
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interface Order {
  id: string;
  asset: string;
  type: 'buy' | 'sell';
  price: number;
  quantity: number;
  timestamp: Date;
}

interface Trade {
  buyerOrderId: string;
  sellerOrderId: string;
  asset: string;
  price: number;
  quantity: number;
  timestamp: Date;
}

function matchOrders(buyOrder: Order, sellOrder: Order): Trade | null {
  if (buyOrder.asset === sellOrder.asset &&
      buyOrder.price >= sellOrder.price) {
    const tradeQuantity = Math.min(buyOrder.quantity, sellOrder.quantity);
    return {
      buyerOrderId: buyOrder.id,
      sellerOrderId: sellOrder.id,
      asset: buyOrder.asset,
      price: sellOrder.price, // or some midpoint calculation
      quantity: tradeQuantity,
      timestamp: new Date()
    };
  }
  return null;
}

// Example Usage:
const buyOrder: Order = {
  id: 'buy123',
  asset: 'MSFT',
  type: 'buy',
  price: 330.00,
  quantity: 10,
  timestamp: new Date()
};

const sellOrder: Order = {
  id: 'sell456',
  asset: 'MSFT',
  type: 'sell',
  price: 329.95,
  quantity: 15,
  timestamp: new Date()
};

const tradeResult = matchOrders(buyOrder, sellOrder);
if (tradeResult) {
  console.log('Trade executed:', tradeResult);
} else {
  console.log('No trade matched.');
}

            

              
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interface PriceData {
  timestamp: Date;
  price: number;
}

function calculateSMA(data: PriceData[], period: number): number | null {
  if (data.length < period) {
    return null; // Not enough data
  }
  const sum = data.slice(-period).reduce((acc, curr) => acc + curr.price, 0);
  return sum / period;
}

// Example Usage:
const historicalPrices: PriceData[] = [
  { timestamp: new Date('2024-01-01'), price: 100 },
  { timestamp: new Date('2024-01-02'), price: 102 },
  { timestamp: new Date('2024-01-03'), price: 105 },
  { timestamp: new Date('2024-01-04'), price: 103 },
  { timestamp: new Date('2024-01-05'), price: 106 },
  { timestamp: new Date('2024-01-06'), price: 108 },
];

const smaPeriod = 3;
const smaValue = calculateSMA(historicalPrices, smaPeriod);

if (smaValue !== null) {
  console.log(`SMA (${smaPeriod}):`, smaValue);
  // Implement trading logic based on SMA value
  if (historicalPrices[historicalPrices.length - 1].price > smaValue) {
    console.log('Buy signal');
  } else {
    console.log('Sell signal');
  }
}

            

              
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async function getMarketData(symbol: string, exchange: string): Promise {
  // Assume an API endpoint:  `https://api.example.com/marketdata?symbol=${symbol}&exchange=${exchange}`
  try {
    const response = await fetch(`https://api.example.com/marketdata?symbol=${symbol}&exchange=${exchange}`);
    if (!response.ok) {
      throw new Error(`HTTP error! Status: ${response.status}`);
    }
    const data = await response.json();
    return data;
  } catch (error) {
    console.error(`Error fetching data for ${symbol} from ${exchange}:`, error);
    return null;
  }
}

// Usage example
async function processData() {
  const aaplData = await getMarketData('AAPL', 'NASDAQ');
  if (aaplData) {
    console.log('AAPL Data:', aaplData);
  } else {
    console.log('Failed to fetch AAPL data.');
  }
}

processData();

            

              
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