in December i put 172k on my personal CC( bought a steel building), my credit score went up 4 points. When i got the statement in January i paid it in full, my score dropped 33 points.
make it make sense.
It is an algorithm that looks for consistency. If you do this type of thing on a regular basis it will continue to raise your score over time. However, on a one off it raises red flags within the system. What you did will raise suspicion of either money laundering, or inability to gain loans (old check kiting schemes).
This is a common issue when someone obtains a reward card specifically to get all the benefits possible (GM, Ford, airlines, hotel chain, etc.). Many of these people will use the card as much as possible and pay it off daily, weekly, or like you, as soon as the statement comes. Once the algorithm recognizes your patterns it will reward consistency.