Native Americans (NAs) experience disproportionate exposure to chronic sociocultural stressors that may shape physiological stress systems and contribute to health disparities. Yet, little research has examined acute stress reactivity, stress recovery, and their predictors in NAs. The present study investigated the independent and joint effects of sex and socioeconomic position (SEP) on sympathetic-adrenomedullary (SAM), hypothalamic-pituitary-adrenal (HPA), and negative affective responses to…