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- Sharpe ratio - Imagine if the distribution of returns had a regular (Gaussian) bell curve shape. The Sharpe ratio shows how wide the bell is. Steeper bell is better.
- Sortino ratio - Same as Sharpe, but we only care about the left half. Steep left half is better (smaller tails).
- Omega ratio - We know that the distribution of returns is non-gaussian (the bell has irregular shape). Let's measure the the area under the curve for the left/down part and for the right/up part. The ratio between the two is called the omega ratio.
- Rachev ratio - Same as Omega, but let's find only the degen assets, we only care about the tails of the curve. Let's find which ones have the fattest tails.
en.wikipedia.org/wiki/Rachev_ra…

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