Livoa LogoLivoa
Dynamic graph G(T)


u1 --- t --- v1

Edge feature euv


Daily adjusted closing prices

Dynamic Embedding Learning
Memory embedding


mu1(t) → GRU → su1(t)

mv1(t) → GRU → sv1(t)

Graph embedding


attn → User embedding zu1(t)

→ Item embedding zv1(t)

Mean-Variance Efficient Sampling
Candidate items Cu1,t


v3 v2 v5

Preference-based rank


v1 v3 v2 v5

Portfolio-based rank


v2 v5 v1 v3

Final rank


v1 v2 v3 v5

BPR Loss


zu1(t)

×

zv1(t) (Positive score)

×

zv5(t) (Negative score)

Profit aware

by Aureon

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