Egyptian major stocks tumbled over 5 per cent in early trade on Monday after the new president ordered parliament to reconvene, challenging the authority of the military which had ordered it dissolved. The benchmark EXG30 is currently trading 4.34 per cent down at 4,689 points. The broader EGX70 is also down 3.89 per cent. At least half of the main index\'s 30 stocks were suspended for half an hour after they fell by more than the 5 per cent allowed under exchange rules.