How a Side Call Pauses GameStop Mania: QuickTake

GameStop Corp.  Stores as brokers facilitate trade restrictions

Photographer: Alex Kraus / Bloomberg

Small investors and others watching the market swings around GameStop Corp. and other stocks have learned a long list of trading terms, including short squeeze, call options and range coverage. The decision to Robinhood Markets and other trading platforms to close the door on the most volatile stocks are introducing them to two others: clearinghouse and guarantee requirements. They are invisible parts of Wall Street infrastructure, except when things get wild.

1. What happened?

The Depository Trust & Clearing Corp., or DTCC, the main center of the United States stock markets, demanded large sums of guarantees from brokers, including Robinhood, which for weeks facilitated spectacular leaps in stocks like GameStop. In response, Robinhood and some other trading platforms have raised large sums of money to post on the DTCC to increase their protection against losses. They also controlled the risk for themselves by banning certain operations. Robinhood also moved to undo some customer bets, prompting customer protests.

2. What is a clearing house?

Clearing houses such as the DTCC act as intermediaries between buyers and sellers. They exist to protect investors and the markets, ensuring that participants, such as brokers, have the funds available to support the trades they conduct and to determine who will be paid in the event of default. Clearing companies charge fees on transactions.

3. What is compensation and what is guarantee?

Clearing is the business of managing and settling a transaction after a transaction has occurred. The guarantee is something of value – sometimes money, usually bonds – that is disclosed as protection against possible defaults. It is a requirement found in many types of transactions: for a mortgage, the property being purchased serves as a guarantee. In the financial markets, collateral generally represents a small part of the value of transactions. In the 2008 financial crisis, markets stopped when banks began to suspect that their counterparties would fail and that the guarantees they had deposited would be inadequate. Although the authorities subsequently enforced the rules related to clearing derivatives, clearing shares in cash was largely overlooked. In fact, the rule that defines the margin requirements for buying shares in cash, known as Reg-T, dates from 1974.

4. What kind of risks was the GameStop trading frenzy creating?

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