Fractional Share

A fractional share is an interest in less than one whole share of a company or fund. An investor might hold 0.25 of a share, or 3.4 shares, with the part after the decimal point being the fraction. Fractions give a proportional economic interest: the holder of half a share receives half the dividend paid on a full share and half of any gain or loss in its price.

Fractional shares arise in two quite different ways. Some are a by-product of corporate actions and reinvestment plans, where a ratio or a cash amount does not convert into a whole number of shares. Others are created deliberately by brokers that let retail clients invest a fixed sum of money, such as 10 dollars, in a stock whose price is far higher. In most markets the issuer's register and the central securities depository record only whole shares, so fractions usually exist only on the books of a broker, fund or plan administrator.

The older source is the corporate event. A stock split at an uneven ratio, a stock dividend, a merger in which shares of the target are exchanged for shares of the buyer, or a reverse stock split can all leave a holder with a fractional entitlement. Issuers commonly avoid issuing the fraction by paying cash compensation instead. A dividend reinvestment plan is another source: the cash dividend seldom buys an exact number of shares, so plans credit participants with fractions carried to several decimal places. Units in a mutual fund have long been issued in fractions for the same reason, since investors subscribe by amount.

The newer source is fractional trading. Since the late 2010s many retail brokers and investing apps have offered purchases by cash value, which made expensive shares accessible to small accounts and made it simple to build a diversified portfolio or to invest a regular monthly sum.

Because the market trades and settles whole shares, the broker has to bridge the gap. A common model is for the broker, or an affiliated dealer, to hold whole shares in its own inventory or in an omnibus account and to allocate fractions of them to clients in its internal records. When a client buys 0.2 of a share, the broker may fill the order from inventory acting as principal, or combine it with other client orders and buy a whole share in the market, keeping any unallocated remainder itself. Orders may be executed in real time or collected and executed at set times of day.

The client's holding is therefore a book entry at the broker. The broker remains the registered or depository-level holder, usually through a nominee, and the client is the beneficial owner of a share in that position. Regulators generally expect fractional orders to receive best execution in the same way as whole-share orders and require clear disclosure of how they are handled.

Economic rights normally pass through in proportion: dividends, proceeds of corporate actions and sale value are scaled to the fraction, subject to rounding to the smallest currency unit. Other rights are less certain and depend on the broker's terms.

• Voting. Some brokers aggregate fractions and vote them, some pass through votes only on whole shares, and some give fractional holders no vote.
• Transfer. Fractions usually cannot be moved to another broker. On an account transfer the whole shares move and the fraction is sold, which may create a taxable disposal.
• Elective events. Participation in a voluntary corporate action, such as a rights issue or tender offer, may be limited or unavailable for the fractional part.
• Order types. Fractional orders are often limited to market orders or to trading during regular hours.

In the United States, fractional positions held at a broker are customer property under the customer protection rules, and securities investor protection applies to them as to other securities. Reporting rules have been adapted so that fractional trades are reported to the tape. In the European Union and the United Kingdom, regulators have examined whether some fractional products give the client a real ownership interest in the share or are in substance a derivative contract with the firm, which affects how they must be sold and whether they qualify for tax-advantaged accounts. The answer depends on the legal structure used, so the terms of service matter.

Fractional shares concentrate dependence on one intermediary: the fraction cannot exist outside the broker that created it. Liquidity is whatever the broker provides, and pricing may differ slightly from the whole-share market. Records of tax lots become more detailed, as every small purchase and reinvestment creates a separate lot. For issuers and transfer agents, fractions complicate proxy voting and the reconciliation of beneficial holdings to the register, which is one reason issuers generally settle fractions in cash at the time of a corporate action.