Technically from a legal point of view a lot of what has been written in this thread is incorrect. Martin Brown has hit the nail on the head in his last post. Legally you are speculating on the level of a company’s index and not directly on the underlying. If a company’s feed fails then this is their problem and not yours.
Further more any contract formed in relation to a spreadbet is covered under the Financial Services and Markets Act of 2000. The Act states that all spreadbet contracts are enforceable by law by either party. You will find that most of the companies claim to have small print which allows them to reverse trades which might have been opened with you in error. For the most part this small print is unenforceable on the company’s part as, in the same contract, you will notice that it states that nothing in the contract will contradict the customers rights under the Financial Services and Markets Act. The contract will often go on to state something along the lines of ‘should a conflict occur between the customer agreement and the financial services and markets act then the financial services and market act will take precedence’. It therefore follows that the company trying to cancel a trade is a direct breach, under the financial services and markets act, of your right to enforce the contract in regard to the individual spread bet. If you press the compliance department then they will have no choice but to let you keep the bet.
Steve.
PS Not legally qualified to give advice etc etc etc.