phase-7: code restructure

2026-06-05 22:05:55 -04:00
parent c160e65bd6
commit 357b0c0f6e
108 changed files with 8931 additions and 3434 deletions
@@ -0,0 +1,84 @@
+import { YahooFinanceClient } from '../clients/YahooFinanceClient';
+import { REGIME } from '../config/constants';
+import type { MarketContext, Logger, BenchmarkProviderOptions } from '../types';
+
+export class BenchmarkProvider {
+  private static readonly TTL_MS = 60 * 60 * 1000;
+
+  private static readonly DEFAULTS: MarketContext = {
+    sp500Price: 5000,
+    riskFreeRate: 4.5,
+    vixLevel: 20,
+    rateRegime: 'HIGH',
+    volatilityRegime: 'NORMAL',
+    benchmarks: { marketPE: 22, techPE: 30, reitYield: 3.5, igSpread: 1.0 },
+  };
+
+  private static rateRegime(rate: number): MarketContext['rateRegime'] {
+    return rate < 2 ? REGIME.LOW : rate <= 5 ? REGIME.NORMAL : REGIME.HIGH;
+  }
+
+  private static volRegime(vix: number): MarketContext['volatilityRegime'] {
+    return vix < 15 ? REGIME.LOW : vix <= 25 ? REGIME.NORMAL : REGIME.HIGH;
+  }
+
+  private static pe(summary: any): number | null {
+    return summary?.summaryDetail?.trailingPE ?? summary?.defaultKeyStatistics?.forwardPE ?? null;
+  }
+  private client: YahooFinanceClient;
+  private cache: { data: MarketContext | null; expiresAt: number };
+  private logger: Logger;
+
+  constructor({ logger }: BenchmarkProviderOptions = {}) {
+    this.client = new YahooFinanceClient();
+    this.cache = { data: null, expiresAt: 0 };
+    this.logger = logger ?? (console as unknown as Logger);
+  }
+
+  async getMarketContext(): Promise<MarketContext> {
+    if (this.cache.data && Date.now() < this.cache.expiresAt) return this.cache.data;
+
+    try {
+      const [sp500, tn10y, vix, spy, xlk, xlre, lqd] = await Promise.all([
+        this.client.fetchSummary('^GSPC'),
+        this.client.fetchSummary('^TNX'),
+        this.client.fetchSummary('^VIX'),
+        this.client.fetchSummary('SPY'),
+        this.client.fetchSummary('XLK'),
+        this.client.fetchSummary('XLRE'),
+        this.client.fetchSummary('LQD'),
+      ]);
+
+      const riskFreeRate =
+        (sp500 as any)?.price?.regularMarketPrice !== undefined
+          ? ((tn10y as any)?.price?.regularMarketPrice ?? 0)
+          : 0;
+      const sp500Price = (sp500 as any)?.price?.regularMarketPrice ?? 0;
+      const vixLevel = (vix as any)?.price?.regularMarketPrice ?? 0;
+
+      if (!sp500Price || !riskFreeRate) throw new Error('Invalid market data (zero values)');
+
+      const lqdYield = ((lqd as any)?.summaryDetail?.trailingAnnualDividendYield ?? 0) * 100;
+
+      const context: MarketContext = {
+        sp500Price,
+        riskFreeRate,
+        vixLevel,
+        rateRegime: BenchmarkProvider.rateRegime(riskFreeRate),
+        volatilityRegime: BenchmarkProvider.volRegime(vixLevel),
+        benchmarks: {
+          marketPE: BenchmarkProvider.pe(spy) ?? 22,
+          techPE: BenchmarkProvider.pe(xlk) ?? 30,
+          reitYield: ((xlre as any)?.summaryDetail?.trailingAnnualDividendYield ?? 0.035) * 100,
+          igSpread: Math.max(0.1, lqdYield - riskFreeRate),
+        },
+      };
+
+      this.cache = { data: context, expiresAt: Date.now() + BenchmarkProvider.TTL_MS };
+      return context;
+    } catch (err) {
+      this.logger.warn('Market data fetch failed, using defaults:', (err as Error).message);
+      return this.cache.data ?? BenchmarkProvider.DEFAULTS;
+    }
+  }
+}