This document discusses the management of cash and marketable securities. It describes motives for holding cash such as for transactions, speculation, and precaution. It also discusses ways to speed up cash receipts through earlier billing, lockbox systems, and concentration banking. Methods to slow down cash payouts include "playing the float", controlling disbursements through techniques like zero balance accounts. The optimal level of cash to hold balances transaction needs and bank requirements. Marketable securities are short-term investments held to earn interest on temporary excess cash.