FILE PHOTO: An Aston Martin logo is pictured during the 88th Geneva International Motor Show in Geneva, Switzerland, March 6, 2018. REUTERS/Denis Balibouse/File Photo

LONDON (Reuters) - Shares in luxury carmaker Aston Martin AML.L opened flat at the offer price of 19 pounds ($24.70) per share in its London debut on Wednesday.

By 0707 GMT the stock inched up to 19.14 pounds per share.

Bankers typically target a slight bump in the stock on the first day of trading of an initial public offering to help build momentum.