ดัสซอลต์เอวิเอชันยกเลิกหุ้นทุนซื้อคืนจำนวน 519,137 หุ้น

Cancellation of treasury shares reduces share capital, typically neutral to slightly positive for EPS but here it's a capital structure change; however, the article reports a reduction in share capital, which is often seen as negative for the stock price due to reduced equity base, but actually it's a capital management action. Given the context, it's ambiguous, but the direction is likely neutral. I'll set as ambiguous.