mˈoʊst ˈʌðɚ stˈaɪlz ʌv ˈɑːpʃənz, sˈʌtʃ ɐz ɐmˈɛɹɪkən, ɑːɹ lˈɛs sˈuːɾəbəl, bɪkˈʌz ðeɪ mˈeɪ ɛkspˈoʊz tɹˈeɪdɚz tʊ ʌnwˈɔntᵻd ɹˈɪsk ɪf wˈʌn ɔːɹ mˈoːɹ "lˈɛɡz" əvə spɹˈɛd ɑːɹ ˈɛksɚsˌaɪzd pɹɪmətʃˈʊɹli.
Most other styles of options, such as American, are less suitable, because they may expose traders to unwanted risk if one or more "legs" of a spread are exercised prematurely.