The two loops
The word training means two different things here. One kind trains the market model. The other kind trains a strategy against a market that exists. Most people need only the second kind.
LOOP A
Calibrate the market model
map the space
Atlas survey
then
confirm
disjoint seeds
then
gates
thirty seeds
then
overfitting
control
emits
preset pt-v14, frozen
A complete set of coefficients with one name. Change any of them and the set gets a new name.
the realism envelope
Attached to the preset. Bounds what a result may claim.
cited by, and bounds
LOOP B
Evaluate a strategy or agent
write a strategy
or train a policy
then
evaluate
many seeds
then
paired sign test
across seeds
Nothing travels back. If you tune the market on the results of a strategy, you put the edge of that strategy into the world that then measures it.
Which loop you are in decides what you read
What the envelope adds
The preset carries a measurement with it. pt-v14 holds all fourteen realism statistics inside their real-market bands at the certified horizon of 252 trading days. It also names five gaps where it does not hold. A Loop B result gets both. The certification lets you say the market reproduced those fourteen habits of real equities. The gaps stop you before you say more than that.