Shares of At Home Group Inc. plunged 39% in premarket trading Thursday, after the home decor retailer reported fiscal third-quarter earnings that beat expectations, but slashed its full-year profit and same-store sales outlook, citing weak sales of Christmas offerings and tariff-related headwinds. The company reported late Wednesday that it swung to a net loss of $14.6 million, or 23 cents a share, from a profit of $11.1 million, or 17 cents a share, in the year-ago period. Excluding non-recurring items, earnings were breakeven on a per-share basis, compared with the FactSet consensus for a 2-cent loss. Net sales rose 19% to $318.7 million to beat expectations of $314.8 million, while same-store sales fell 2.0% to miss expectations of a 1.9% decline. For fiscal 2020, the company cut its guidance ranges for adjusted EPS to 51 cents to 56 cents from 67 cents to 74 cents, for net sales to $1.35 billion to $1.36 billion from $1.37 billion to $1.39 billion and for same-store sales to down 2.6% to down 2.0% from down 1.5% to up 0.5%. “As more of the [tariff] price-impacted products have arrived in our stores, our analysis has shown that a more unfavorable sales impact began in Q3,” said Chief Executive Lewis Bird, according to a FactSet transcript of the post-earnings conference call with analysts. “While we believe the price position of our assortment is competitive among our peers, the customer is beginning to pull back from higher prices on certain tariff-impacted items.” The stock has run up 31% over the past three months through Wednesday, while the S&P 500 has gained 4.6%.