If you open several new accounts within a short period of time, your credit score could be damaged. (u-fi.com)
In case you open several new accounts simultaneously, you may shorten the average age of your credit history, the same is valid for closing old even inactive accounts. (personalmoneyservice.com)
Hard inquiries start to add up and do the most damage to your credit score when you open several new accounts in a short period of time. (renttrack.com)