Would You Take This Bet?

Discussion in 'Trading' started by rmorse, Apr 22, 2015.

  1. kut2k2

    kut2k2

    .50-.5/1.2 = .083333
     
    #21     Apr 22, 2015
  2. Visaria

    Visaria

    thanks, i was using 0.2 instead of 1.2 in my calcs, haha

    i find edge divided by net return to be easier to calculate...so it would be 0.1 divided by 1.2 (i was using 0.2)
     
    #22     Apr 22, 2015
  3. I was bored once...and out of the blue...I decided to flip my quarter:

    it landed on Heads...17X in a Row! i felt like i won the Lottery or something.:eek:
    i remember Googling the odds of that happening...and i might of as well ...won the lottery.
     
    #23     Apr 22, 2015
  4. rmorse

    rmorse Sponsor

    Am I the only one that had to look up the word "innumerate" and then the description of the Kelly Criterion?
     
    #24     Apr 22, 2015
  5. Kelly does not do that implicitly. Where did you get that idea from? Care to elaborate?

     
    #25     Apr 23, 2015
  6. kut2k2

    kut2k2

    The Kelly fraction is based directly on trade returns. All their information, including their volatilities, are right there.
     
    #26     Apr 23, 2015
  7. disagree. Kelly applies more to fixed bets where the odds are known but much more importantly the probabilities of winning and losing can be pretty well estimated. That does not apply at all to financial markets where your probabilities of winning and losing (essentially the probability to reach your stop loss earlier than your profit target, given you start with odds by setting stop loss and profit targets) are constantly changing as function of price volatility. Kelly especially does not take into account implied/expected price volatility. So, I strongly disagree with your statement.

     
    #27     Apr 23, 2015
  8. VPhantom

    VPhantom

    Fun post! For me, 1:1 is a no-go and I thought it was an interesting tell when he upped to $12. The very fact that he was willing to increase his offer intrigued me to see how far he'd go before possibly accepting. Not sure I would've managed to get to $20 (depends on the actual conversation we would've had) but I definitely wouldn't have settled for the initial increase to $12.
     
    #28     Apr 23, 2015
  9. rmorse

    rmorse Sponsor

    I think I would have accepted the 12:10 if I could flip the coin, even if it was once, knowing I need a bigger sample for the odds to work. It was only $10. If it were $100, I would have wanted at least 10 bets, not knowing the math above.
     
    #29     Apr 23, 2015
  10. Redneck

    Redneck

    I would not have taken the bet as a 1 off (1 time only)

    When he offered up to repeat it 100 time - yeah - I'm in


    RN
     
    #30     Apr 23, 2015