ROI - investitsiyalar qaytarilishi. ROI - sof foyda va sarflangan pul miqdori nisbati, odatda foiz sifatida beriladi. Masalan, agar investitsiya 20 dollarga sotib olingan bo'lsa, keyin 30 dollarga sotilsa, ROI (30 - 20) / 20 * 100% = 50% ROI bo'ladi.
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