pull down to refresh

@mega_dreamer I need to know some things from you if I can be let known:
  1. Is Predyx using the standard LMSR cost function: C(q) = b \cdot \ln\left( \sum_{i=1}^{n} e^{q_i / b} \right) Or is it modified in any way (e.g., using a different log base, normalization constants, or weighting)?
  2. How is q_i (quantity of shares) initialized from probability? I’m initializing shares using: q_i =b \cdot ln(p_i) where p_i is the initial market-implied probability (e.g., 24% means 0.24). Is this what you use? Or is it something like: q_i = b \cdot ln(p_i/p_0) Or any other transformation?
  3. What value of 𝑏 are you using in the current FIFA market? Is it fixed (e.g., 156) or dynamic based on the market type?
  4. Is buying 100 YES shares for Team A equivalent to buying 100 NO shares for all other teams proportionally? Or are YES/NO shares treated as separate instruments with different mechanics?
  5. Do you apply any rounding, probability smoothing, or limits to how much probabilities can jump after a large buy/sell?
We have a standard LMSR, no deviations of any kind. I will answer in details tomorrow. Partied too hard - its weekend.
What value of 𝑏 are you using in the current FIFA market?
b = 100k sats for FIFA market fixed - we may increase the b based on trading activity. But the current b = 100k.
Is buying 100 YES shares for Team A equivalent to buying 100 NO shares for all other teams proportionally? Or are YES/NO shares treated as separate instruments with different mechanics?
NO - its inverse. Ex: if you're buying 100 yes at 0.20 sats for Team A, and if you're betting on Team A - NO. it'll be 0.80 sats (1 - 0.20 = 0.80). We interpret NO as buying YES on all the team except Team A. In other word, you're buying YES on all the team except Team A. Standard LMSR again.
Hope that helps, otherwise I'm happy to explain more later.
reply
0 sats \ 6 replies \ @noknees 4h
We have a standard LMSR, no deviations of any kind. I will answer in details tomorrow.
OK, thanks!
Is the liquidity fixed or dynamic based on the market type?
reply
Normally its fixed till end of market. Some exception in edge case. But treat is as fixed.
reply
0 sats \ 4 replies \ @noknees 4h
I mean, is it the same for all the markets, 100k sats? Sorry for disturbing you so much
reply
No - it's different for every market. This one is 30k.
reply
101 sats \ 2 replies \ @noknees 4h
Oh ok thank you!