buystock.net
Glossary entry

Fractional Shares

Also known as: fractional trading · stock slices · dollar-based investing

Fractional shares let investors buy less than one share of a stock or ETF, expressed either as a fractional quantity (0.25 shares) or a dollar amount ($50 of AAPL).

Fractional shares solve the access problem for high-priced names: a single share of BRK.A costs over $600,000, and Nasdaq mega-caps regularly trade above $400 per share. Brokers offer fractional trading by aggregating retail orders and netting them against round-lot positions held in inventory, then allocating fractional sub-positions on the customer side.

Implementations differ significantly. Robinhood, Fidelity and Webull support full dollar-based fractional trading on most US-listed common stocks and ETFs. Schwab Stock Slices is restricted to S&P 500 constituents and a $5/slice minimum. Interactive Brokers and E*TRADE offer fractional trading with broader universe coverage but specific product constraints. Many brokers exclude OTC stocks and ADRs from fractional eligibility.

Trading mechanics differ for fractionals: orders typically execute at the market open or in batched windows rather than instantaneously, prices may include a small spread, and fractional positions cannot always be transferred via ACATS to another broker (the fractional portion may be liquidated). Dividends and corporate actions are pro-rated to fractional positions.

Brokers most relevant to this concept

See also

  • Penny Stock — The SEC defines a penny stock as a security trading under $5 per share — but in practice the term refers to thinly-traded micro-cap stocks, often on the OTC market.
  • 24-Hour Trading — 24-hour trading lets retail investors place orders on US equities outside the standard 9:30am-4:00pm ET session, typically Sunday evening through Friday evening.