The Chancellor was said to be considering the idea of reducing the amount that can be saved into cash Isas annually to encourage people to direct more money into stocks and shares.
The Chancellor discussed with leading City firms how to create more of an investment culture in the UK in an indication that she could make changes to the tax-free savings accounts.
Major firms argue that almost £300 billion sitting in cash Isas would generate better returns - and help Labour's growth mission - if it was instead invested in the much riskier stock market .