The tricky winger has impressed in his three appearances to date with Nigel Pearson's Tigers, and United Reserves manager Warren Joyce is delighted with his start to life at the KC Stadium.
"We're pleased because we want the boy to do well," Joyce told the Hull Daily Mail. "He's played and made a contribution in games.
"When players go out on loan they've got to earn their place in the team, and he has so far which is good."
Stewart's successful start with Hull is all the more satisfying given his frustrating loan at Yeovil earlier this season, where he rarely featured.