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feat: ticker validation + SLV/USO/WEAT/CORN/TUR added to ETFs watchlist

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Backend:
- GET /api/market/validate?symbol= — validates ticker against yfinance,
  returns {valid, name, price} or {valid: false, reason: 'helpful message'}
- Added SLV, USO, WEAT, CORN, TUR to ETFs WATCHLIST category

Frontend:
- validateTicker() async helper exported from useApi.ts
- InstrumentPicker (PatternLab): custom ticker field now validates before selecting
  Shows spinner while checking, red error message if not found on yfinance
- InstrumentLens (PatternExplorer): same validation on Go button + Enter key

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
OpenSquared
2026-06-22 20:15:26 +02:00
parent a92094e1f3
commit 6cca7f66b6
5 changed files with 131 additions and 36 deletions
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41
backend/services/data_fetcher.py
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@@ -56,24 +56,29 @@ WATCHLIST: Dict[str, List[Dict[str, str]]] = {
{"symbol": "^VIX", "name": "VIX Volatility", "currency": "USD"},
],
"etfs": [
{"symbol": "SPY", "name": "S&P 500 ETF (SPY)", "currency": "USD"},
{"symbol": "QQQ", "name": "NASDAQ 100 ETF (QQQ)", "currency": "USD"},
{"symbol": "IWM", "name": "Russell 2000 ETF (IWM)", "currency": "USD"},
{"symbol": "TLT", "name": "20Y Treasury ETF (TLT)", "currency": "USD"},
{"symbol": "IEF", "name": "7-10Y Treasury ETF (IEF)","currency": "USD"},
{"symbol": "HYG", "name": "High Yield Bond (HYG)", "currency": "USD"},
{"symbol": "GLD", "name": "Gold ETF (GLD)", "currency": "USD"},
{"symbol": "EEM", "name": "EM ETF (EEM)", "currency": "USD"},
{"symbol": "FXI", "name": "China Large Cap (FXI)", "currency": "USD"},
{"symbol": "EWG", "name": "Germany ETF (EWG)", "currency": "USD"},
{"symbol": "EWJ", "name": "Japan ETF (EWJ)", "currency": "USD"},
{"symbol": "EWU", "name": "UK ETF (EWU)", "currency": "USD"},
{"symbol": "EWZ", "name": "Brazil ETF (EWZ)", "currency": "USD"},
{"symbol": "XLF", "name": "Financials ETF (XLF)", "currency": "USD"},
{"symbol": "SMH", "name": "Semiconductors (SMH)", "currency": "USD"},
{"symbol": "KWEB", "name": "China Internet (KWEB)", "currency": "USD"},
{"symbol": "UUP", "name": "US Dollar ETF (UUP)", "currency": "USD"},
{"symbol": "BIL", "name": "T-Bill 1-3M (BIL)", "currency": "USD"},
{"symbol": "SPY", "name": "S&P 500 ETF (SPY)", "currency": "USD"},
{"symbol": "QQQ", "name": "NASDAQ 100 ETF (QQQ)", "currency": "USD"},
{"symbol": "IWM", "name": "Russell 2000 ETF (IWM)", "currency": "USD"},
{"symbol": "TLT", "name": "20Y Treasury ETF (TLT)", "currency": "USD"},
{"symbol": "IEF", "name": "7-10Y Treasury ETF (IEF)", "currency": "USD"},
{"symbol": "HYG", "name": "High Yield Bond (HYG)", "currency": "USD"},
{"symbol": "GLD", "name": "Gold ETF (GLD)", "currency": "USD"},
{"symbol": "SLV", "name": "Silver ETF (SLV)", "currency": "USD"},
{"symbol": "USO", "name": "Oil ETF (USO)", "currency": "USD"},
{"symbol": "EEM", "name": "EM ETF (EEM)", "currency": "USD"},
{"symbol": "FXI", "name": "China Large Cap (FXI)", "currency": "USD"},
{"symbol": "EWG", "name": "Germany ETF (EWG)", "currency": "USD"},
{"symbol": "EWJ", "name": "Japan ETF (EWJ)", "currency": "USD"},
{"symbol": "EWU", "name": "UK ETF (EWU)", "currency": "USD"},
{"symbol": "EWZ", "name": "Brazil ETF (EWZ)", "currency": "USD"},
{"symbol": "XLF", "name": "Financials ETF (XLF)", "currency": "USD"},
{"symbol": "SMH", "name": "Semiconductors (SMH)", "currency": "USD"},
{"symbol": "KWEB", "name": "China Internet (KWEB)", "currency": "USD"},
{"symbol": "UUP", "name": "US Dollar ETF (UUP)", "currency": "USD"},
{"symbol": "BIL", "name": "T-Bill 1-3M (BIL)", "currency": "USD"},
{"symbol": "TUR", "name": "Turkey ETF (TUR)", "currency": "USD"},
{"symbol": "WEAT", "name": "Wheat ETF (WEAT)", "currency": "USD"},
{"symbol": "CORN", "name": "Corn ETF (CORN)", "currency": "USD"},
],
"equities": [
{"symbol": "XOM", "name": "Exxon Mobil", "currency": "USD"},