Iran’s armed forces chief of staff warned countries on the southern shore of the Persian Gulf not to facilitate US forces, saying any assistance to US troops would be treated as participation in military action against Iran. He said Tehran is closely monitoring US bases in the region and warned host countries against enabling US operations, adding that states claiming they would not allow the US to use their territory to strike Iran should know nothing escapes Tehran’s notice.

2026-08-19

Iran’s armed forces chief of staff warned countries on the southern shore of the Persian Gulf not to facilitate US forces, saying any assistance to US troops would be treated as participation in military action against Iran. He said Tehran is closely monitoring US bases in the region and warned host countries against enabling US operations, adding that states claiming they would not allow the US to use their territory to strike Iran should know nothing escapes Tehran’s notice.

其他消息
2026-08-19

印尼盾在中央銀行維持利率後基本持平。

2026-08-19

瑞銀的回測顯示,Delta對衝後的保護性Put更擅長應對「急跌+波動率暴衝」,對緩慢下跌的保護效果明顯較弱。2020年3月和2025年4月這類快速下跌中,實際波動和隱含波動率同步飆升,策略可以通過Gamma和Vega快速積累收益,並降低傳統Put長期持有的負Carry。 但在2022年以及2026年3月中東局勢升級期間,美股都曾出現較爲漸進的下跌,波動率並未同步大幅上升。UBS指出,在這種環境下,Delta對衝Put很難發揮明顯保護作用,因爲它已經削弱了方向性敞口,而Gamma和Vega又沒有獲得足夠的波動收益。 這意味着,組合保險也需要匹配風險類型:尾部保護更適合防範突然的大幅下跌,慢跌環境則需要搭配針對淺度回撤或漸進式調整的其他策略。