I have found the reason for the drop when exchange happens is because the reward per block increases over time. Its not a good holding coin... literally a mine and dump it seems. Not sure how that's profitable, but it is for us that way.
By the time the block matures the value of those coins seems always to get adjusted by just about 25% (-1/4). Which still isn't bad.
When pool hashrate is under 3Gh, pool luck is exponential. I have gone ~ -0.014-18 in my trial period so far vs. mining straight lyra2.... but the days we have higher hashrates; and get 1-3 blocks a day, it pays over 2X lyra2.
One of the curses of a high diff long confirm coin =)
Anyone else seeing close to the same results?
Ah, that explains it. Yeah, I've been seeing the exact same thing, ~25% drop after the block clears.