“…For optimal investment problems (RS) ∞ , the following linear factor model is well-studied. We can refer to [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [12], [13], [14], [15], [16], [17], [18], and [19], for example. Let (Ω, F, P, (F t ) t≥0 ) be a complete filtered probability space with the filtration (F t ) t≥0 generated by the d-dimensional Brownian motion w := (w 1 , .…”