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shawnkim1997andClaude Opus 4.6
b2acda81ee
Complete migration from Streamlit to Next.js 14 App Router + FastAPI backend. Frontend (Next.js 14): - 10 pages: Overview, Research, Valuation, Technical, Markets, Earnings, News, Portfolio, Filings, Settings - Terminal Noir dark theme with custom Tailwind config - TradingView Lightweight Charts for candlestick/volume - Valuation: DCF, Sensitivity Matrix, Monte Carlo, Tornado, Reverse DCF - Financial Statements table with YoY growth badges and margin rows - SEC EDGAR inline filing viewer with section tabs - News split-view with iframe article embedding - Technical Analysis with RSI, MACD, Bollinger, Fibonacci, Moving Averages - Earnings beat/miss visualization - AI Copilot chat panel with Gemini integration Backend (FastAPI): - 13 routers: market_data, financials, valuation, technical, earnings, insider, edgar, news, portfolio, analysis, chat, estimates, fx - Services: DCF engine, Monte Carlo simulation, sensitivity analysis, risk metrics, SEC parser, technical indicators - yfinance + yahooquery data sources with fallback pattern - SQLite caching layer Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
92 lines
2.8 KiB
Python
92 lines
2.8 KiB
Python
"""FX router -- foreign exchange rates and historical data via yfinance."""
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from typing import Dict, List
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from fastapi import APIRouter, HTTPException
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from server.models.schemas import FXRateResponse, FXHistoryResponse
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router = APIRouter()
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# Major FX pairs tracked by default (Yahoo Finance format: XXXYYY=X)
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MAJOR_PAIRS = [
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"USDKRW", "USDJPY", "EURUSD", "GBPUSD", "USDCNY",
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"USDCHF", "AUDUSD", "USDCAD", "NZDUSD", "EURGBP",
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]
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def _yf_fx_symbol(pair: str) -> str:
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"""Convert a pair like 'USDKRW' to the Yahoo Finance symbol 'USDKRW=X'."""
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p = pair.upper().replace("=X", "").replace("/", "")
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return f"{p}=X"
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def _fetch_fx_rate(pair: str) -> float | None:
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"""Fetch the latest FX rate for a single pair via yfinance."""
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try:
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import yfinance as yf
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symbol = _yf_fx_symbol(pair)
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ticker = yf.Ticker(symbol)
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fast = getattr(ticker, "fast_info", None)
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if fast:
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price = getattr(fast, "last_price", None)
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if price and float(price) > 0:
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return float(price)
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hist = ticker.history(period="1d")
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if hist is not None and not hist.empty:
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return float(hist["Close"].iloc[-1])
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except Exception:
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pass
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return None
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@router.get(
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"/rates",
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response_model=FXRateResponse,
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summary="Major FX rates",
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)
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async def fx_rates():
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"""Return current exchange rates for major currency pairs
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(USD/KRW, USD/JPY, EUR/USD, GBP/USD, etc.).
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"""
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try:
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rates: Dict[str, float] = {}
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for pair in MAJOR_PAIRS:
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rate = _fetch_fx_rate(pair)
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if rate is not None:
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rates[pair] = round(rate, 4)
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return FXRateResponse(pair="MAJOR", rates=rates)
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except Exception as exc:
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raise HTTPException(status_code=500, detail=f"FX rates failed: {exc}") from exc
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@router.get(
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"/history/{pair}",
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response_model=FXHistoryResponse,
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summary="1-year FX history",
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)
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async def fx_history(pair: str):
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"""Return ~1 year of daily closing rates for the given currency pair.
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*pair* should be in the format ``USDKRW``, ``EURUSD``, etc.
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"""
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try:
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import yfinance as yf
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symbol = _yf_fx_symbol(pair)
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ticker = yf.Ticker(symbol)
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hist = ticker.history(period="1y")
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if hist is None or hist.empty:
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raise HTTPException(status_code=404, detail=f"No history found for pair {pair}")
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dates: List[str] = [d.strftime("%Y-%m-%d") for d in hist.index]
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rates: List[float] = [round(float(v), 4) for v in hist["Close"]]
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return FXHistoryResponse(pair=pair.upper(), dates=dates, rates=rates)
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except HTTPException:
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raise
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except Exception as exc:
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raise HTTPException(status_code=500, detail=f"FX history failed: {exc}") from exc
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