Definition: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Input: Passage: The collateralized debt obligation in particular enabled financial institutions to obtain investor funds to finance subprime and other lending, extending or increasing the housing bubble and generating large fees. This essentially places cash payments from multiple mortgages or other debt obligations into a single pool from which specific securities draw in a specific sequence of priority. Those securities first in line received investment-grade ratings from rating agencies. Securities with lower priority had lower credit ratings but theoretically a higher rate of return on the amount invested. Question: What is the name of the securities that enabled financial institutions to obtain investor funds to finance subprime?
Output:
collateralized debt obligation