Is it possible to cancel an investment?

During the offering period, this is not possible. A refund can't be claimed after subscribing to an investment; unless otherwise agreed-upon by the venture.

During the funding round, if you have committed your investment, the sale is final and you cannot cancel your investment. However, if the venture doing the fundraising on STOKR fails to reach the minimum investment amount during its STO, you will receive your full investment back in the currency of the investment.