Return harian saham BBCA — kurva distribusi normal (contoh)
Rata-rata (μ)
0,05%
Volatilitas (σ)
1,20%
X ~ N(0,05% ; 1,20%²)
P(μ−1σ < X < μ+1σ) ≈
68,3%
⌖ Wajar Pasar