The Mecca Joint Defence Agreement, signed in August 2026 by Saudi Arabia, Türkiye, and Pakistan, includes a collective defense clause and has been publicly described as open to new members. No formal accessions have occurred in the two months since, despite expressions of interest or study from Egypt, Syria, Bangladesh, and others. The pact's first activation in early October—triggering Turkish and Pakistani deployments amid Houthi strikes on Saudi infrastructure—has highlighted its operational status but also potential risks for prospective joiners. Egypt faces legal and constitutional reviews plus external treaty constraints, while Syria and Bangladesh have signaled openness without commitments. Trader prices, led by the UAE and Egypt in the mid-to-low range, reflect the short timeline to year-end, absence of announced accessions, and diplomatic hurdles that have slowed expansion to date.