In a speech marking the end of a three-day economic conference, Egypt's president Abdel Fattah Al Sisi reiterated his commitment to peace and growth as he sought more investments from the international community, after receiving commitments worth billions of dollars. Egypt signed investment deals worth more than $138 billion on the first two days of the conference, while its Arab Gulf neighbors—Saudi Arabia, Kuwait and the United Arab Emirates—pledged another $12 billion to help stabilize its economy. But Mr. Sisi, in his concluding remarks, said his country would need a lot more, as much as $300 billion over the coming years, to make its economy strong enough to give its vast population a genuine chance to prosper.