did your trading strategy account for the black swan?

Discussion in 'Trading' started by vincentnyc, Mar 21, 2020.

did your trading strategy account for the black swan?

  1. Yes

    10 vote(s)
    76.9%
  2. No

    3 vote(s)
    23.1%
  1. ValeryN

    ValeryN

    Yes. I did. Bottom-line, on March 22 I'm +30% YTD with -8.03% DD. It wasn't easy to watch though, even when they are to be expected and accounted for...

    The only thing about black Swan events that is certain - they will occur. About once in 5-10 years, statistically speaking. And they can mean different things depending on a strategy, instrument and hold period.

    All we need to do to account for one is - reduce positions sizes to assure reasonable drawdown during periods with highly unusual losses by individual positions. The problem is - expected returns become pretty "boring" even if you have a great strategy. Now we get into 10-20% annual returns per strategy vs 5% per week kinda stuff advertised by crooks. Which one would you choose? :) Especially when everyone is bragging how they made 200% returns in one month, 500%, 1000%...

    For example - when swing trading stocks with an overnight hold that literally means we should be expecting that any stocks can open -50% tomorrow or go bankrupt during your hold period. So how much do you bet on individual stock assuming that can and will eventually happen? What if that happens to 2-3 positions you are holding simultaneously? What if a stock you're shorting went +700% overnight? All of this happened in the past and will happen again. So my max for longs is 10% of account size per position, sometimes less. That greatly reduces returns during "normal periods but assures long-term consistent capital growth.

    Attached an example of some longs my automated strategies recently picked up. All losses were highly unusual for both individual positions and the number of them happening at the same time. But that was expected since when I was developing them I ran multiple variations over the last 30 years of high-quality survivorship bias-free data and tests clearly showed that those events happen.

    March 6-12 longs.png
     
    Last edited: Mar 22, 2020
    #11     Mar 22, 2020
  2. I'm more suspicious and aware when I see my setups forming, cut on size, but pay more attention to classic patterns- like trend lines and to price action- Bookmap heatmap is a great help in this market.[/QUOTE]
     
    #12     Mar 22, 2020