A similar move by other British firms would dent reported profits, though it would make no difference to their cash position. Tesco's profits would drop by 19%, Reuters' by 16%, Pearson's by 14% and Vodafone's by 10%, according to research earlier this year by HSBC Investment Bank. Some technology companies, where options are a key part of remuneration, could be more seriously hit. Chip designer Arm Holdings could have its profits wiped out if it adopted the reform.