The shares of Indian Railway Catering and Tourism Corporation (IRCTC) tanked over 18 per cent in Wednesday’s intra-day trade to Rs 4,371 on the BSE, compared with its previous close, amid heavy volumes. At close, it was at Rs 4,432.95 - down 17.3 per cent on the BSE. A combined 21-million equity shares changed hands on the National Stock Exchange and the BSE.

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