Hedging activity in auto-linked derivatives has intensified due to volatility around "cheap car finance deals". Options open interest suggests traders anticipate stronger than expected Q3 car sales data from the S&P autos subsector. Elsewhere in GM's portfolio, crossovers also hit a Q3 record, with the GMC Terrain, Chevrolet Equinox, Chevrolet Traverse, and Buick Envista all having their best Q3 sales ever. To determine the best auto loans, CNBC Select analyzed more than a dozen car loan providers, including banks, dealerships and online marketplaces. Analysts are flagging that "cheap car finance deals" may lift EBITDA margins for carmakers by pushing volume over fixed production costs, potentially reshaping consensus rating from 'Hold' to 'Buy' in the coming earnings calls.