Sai Kiran Vella
98 lines
3.5 KiB
TypeScript
98 lines
3.5 KiB
TypeScript
import type { Signal, AssetType, RateRegime } from '../types';
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export const SIGNAL = {
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STRONG_BUY: '✅ Strong Buy' as Signal,
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MOMENTUM: '⚡ Momentum' as Signal,
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SPECULATION: '⚠️ Speculation' as Signal,
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NEUTRAL: '🔄 Neutral' as Signal,
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AVOID: '❌ Avoid' as Signal,
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};
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export const ASSET_TYPE = {
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STOCK: 'STOCK' as AssetType,
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ETF: 'ETF' as AssetType,
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BOND: 'BOND' as AssetType,
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CRYPTO: 'crypto',
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};
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// ── Why some constants use `as const` and others don't ────────────────────
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//
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// SIGNAL / ASSET_TYPE / REGIME — each member is individually cast to its
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// named type (e.g. `'✅ Strong Buy' as Signal`). TypeScript already knows
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// the exact literal type of each value, so `as const` on the object would
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// be redundant.
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//
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// SECTOR / SCORE_MODE / CAP_CATEGORY / GROWTH_CATEGORY — these use
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// `as const` because their public type aliases are *derived* from the
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// object itself via `(typeof X)[keyof typeof X]`. Without `as const`,
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// TypeScript widens every value to `string`, and the derived union
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// collapses to `string` instead of `'TECHNOLOGY' | 'REIT' | ...`.
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// ──────────────────────────────────────────────────────────────────────────
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export const SECTOR = {
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TECHNOLOGY: 'TECHNOLOGY',
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REIT: 'REIT',
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FINANCIAL: 'FINANCIAL',
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ENERGY: 'ENERGY',
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HEALTHCARE: 'HEALTHCARE',
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COMMUNICATION: 'COMMUNICATION',
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CONSUMER_STAPLES: 'CONSUMER_STAPLES',
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CONSUMER_DISCRETIONARY: 'CONSUMER_DISCRETIONARY',
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GENERAL: 'GENERAL',
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} as const;
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export type Sector = (typeof SECTOR)[keyof typeof SECTOR];
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export const SCORE_MODE = {
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FUNDAMENTAL: 'FUNDAMENTAL',
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INFLATED: 'INFLATED',
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} as const;
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export const REGIME = {
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LOW: 'LOW' as RateRegime,
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NORMAL: 'NORMAL' as RateRegime,
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HIGH: 'HIGH' as RateRegime,
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};
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export const YAHOO_MODULES: string[] = [
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'assetProfile',
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'financialData',
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'defaultKeyStatistics',
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'price',
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'summaryDetail',
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];
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export const SIGNAL_ORDER: Record<string, number> = {
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[SIGNAL.STRONG_BUY]: 0,
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[SIGNAL.MOMENTUM]: 1,
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[SIGNAL.NEUTRAL]: 2,
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[SIGNAL.SPECULATION]: 3,
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[SIGNAL.AVOID]: 4,
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};
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// ── Market capitalisation tiers ───────────────────────────────────────────
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// Thresholds follow institutional convention (MSCI/Russell definitions).
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export const CAP_CATEGORY = {
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MEGA: 'Mega Cap', // > $200B
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LARGE: 'Large Cap', // $10B – $200B
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MID: 'Mid Cap', // $2B – $10B
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SMALL: 'Small Cap', // $300M – $2B
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MICRO: 'Micro Cap', // < $300M
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} as const;
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export type CapCategory = (typeof CAP_CATEGORY)[keyof typeof CAP_CATEGORY];
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// ── Growth / style classification ─────────────────────────────────────────
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// Derived from revenue growth, earnings growth, and dividend yield.
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// Used for display and to contextualise signals within each cap tier.
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export const GROWTH_CATEGORY = {
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HIGH_GROWTH: 'High Growth', // rev >15% or earnings >20%
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MODERATE_GROWTH: 'Growth', // rev 5–15%
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STABLE: 'Stable', // low growth, modest or no dividend
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VALUE: 'Value', // low growth + dividend yield ≥ 3%
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TURNAROUND: 'Turnaround', // negative earnings, positive revenue
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DECLINING: 'Declining', // negative revenue growth
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} as const;
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export type GrowthCategory = (typeof GROWTH_CATEGORY)[keyof typeof GROWTH_CATEGORY];
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