Wikipedia
Equitable conversion is a doctrine of the law of real property under which a purchaser of real property becomes the equitable owner of title to the property at the time he/she signs a contract binding him/her to purchase the land at a later date. The seller retains legal title of the property prior to the date of conveyance, but this land interest is considered personal property (a right to the payment of money, rather than a right to the property). The risk of loss is then transferred to the buyerif a house on the property burns down after the contract has been signed, but before the deed is conveyed, the buyer will nevertheless have to pay the agreed-upon purchase price for the land. Such issues can and should be avoided by parties by stipulating in the contract who will bear the loss in such occurrences. The above rule varies by jurisdiction, but is the general rule.