摘自wikipedia: Recent searches for credit—hard credit inquiries, which occur when consumers apply for a credit card or loan (revolving or otherwise ), can hurt scores, especially if done in great numbers; often three to five points per inquiry. Individuals "rate shopping" for a mortgage or auto loan over a short period (a fortnight or 45 days, depending on whether old FICO or FICO 08 are used) will likely not experience a large decrease in their scores as a result of these types of inquiries, as automated computer algorithms attempt to detect when a consumer is rate shopping (and not attempting to receive many new lines of credit), and roll all of the hard inquiries into one; this can often take several months, and isn't always effective, although a consumer who believes he or she has received many hard inquiries on their report while searching for one loan (where the automated system has failed to detect it as such) can dispute these with the credit bureau in question.