Egyptian stocks plunged 4.2 per cent upon opening on Thursday, the morning after over 70 people were killed in Port Said in the country's worst football-related disaster.
The benchmark EGX30 is currently trading at around 4,489 points, 15 minutes after the beginning of the week's last session.
The broader EGX70 has fallen 3.77 per cent.
At least 1,000 people were injured on Wednesday night when football fans invaded the pitch in the Mediterranean city of Port Said, after local team Masry beat visitors from Cairo, Ahly, Egypt's most successful club.
Egyptian politicians have denounced the lack of security at the match and accused military leaders of allowing, or even causing, the fighting.