Regulation SHO:. I. requires every sell order to be marked either ""long sale"" or ""short sale"" II. requires every buy order to be marked either ""long purchase"" or ""short purchase"" III. places limits on ""naked"" short sales of equity securities IV. places limits on ""covered"" short sales of equity securities"

I and III.

Explanation:

Regulation SHO is a securities and exchange commission (SEC) rule that is used to regulate "short sale" trading strategies. The main purpose of the "regulation sho" is to prevent unethical and fraudulent behaviors among brokers, investors and traders.

Regulation SHO;

1. Requires every sell order to be marked either "long sale" or "short sale" because it involves the application of a standard uniform rule to all equity securities short sales whether traded over the counter (OTC) or exchange listed.

2. Places limits on "naked" short sales of equity securities such as selling short and not delivering the sales to a short seller on settlement.

Hence, if a sales is short, it is assumed that it can be borrowed and delivered to a short seller by settlement on a specified date.

Additionally, short selling can be defined as an act of borrowing and sales of securities with the expectation that it will decrease in value and then returned to the lender.

answer; risk transference;