/**
 * Extended Hours Trading Service (Pre-market & After-hours)
 *
 * Provides access to pre-market and after-hours trading data
 */
/**
 * Extended hours trading session data
 */
export interface ExtendedHoursData {
    symbol: string;
    companyName: string;
    regularMarket: {
        price: number;
        change: number;
        changePercent: number;
        volume: number;
        time: Date;
        isOpen: boolean;
    };
    preMarket?: {
        price: number;
        change: number;
        changePercent: number;
        time: Date;
        isActive: boolean;
    };
    postMarket?: {
        price: number;
        change: number;
        changePercent: number;
        time: Date;
        isActive: boolean;
    };
    currentSession: 'pre-market' | 'regular' | 'post-market' | 'closed';
    currentPrice: number;
    currentChange: number;
    currentChangePercent: number;
    timestamp: Date;
}
/**
 * Extended Hours Service
 */
export declare class ExtendedHoursService {
    private cache;
    private yahooFinance;
    constructor();
    /**
     * Get extended hours data for a symbol
     */
    getExtendedHours(symbol: string): Promise<ExtendedHoursData>;
    /**
     * Get extended hours data for multiple symbols
     */
    getExtendedHoursBatch(symbols: string[]): Promise<{
        data: Record<string, ExtendedHoursData | null>;
        errors: Record<string, string>;
    }>;
    /**
     * Determine current trading session based on time
     */
    private determineCurrentSession;
    /**
     * Transform Yahoo Finance quote to extended hours data
     */
    private transformExtendedHoursData;
}
/**
 * Singleton instance
 */
export declare const extendedHoursService: ExtendedHoursService;
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