Ally Financial's upcoming October 20 earnings release faces headwinds that support the 64% market-implied probability it will miss consensus estimates of roughly $1.36–$1.38 per share for Q3 2026. The prior quarter's $1.21 adjusted EPS missed Wall Street targets by several cents despite a revenue beat, while Wells Fargo recently downgraded the stock and cut its Q3 EPS forecast to $1.25, citing a $20 million net interest margin drag from Stellantis lease losses and elevated provisions tied to loan growth and normalizing auto charge-offs. Management has reaffirmed 2026 net interest margin guidance of 3.6–3.7% but noted sequential margin pressure in the third quarter, with retail auto net charge-offs expected to remain in the 1.8–2.0% range amid ongoing credit normalization. These factors, combined with recent analyst price-target reductions, underpin trader caution ahead of the report.