Turnover is the part of the trading and investing distinction you can count. Ten round trips and one round trip can deliver the same $500 gross result, but at an explicit $1 fee per transaction the ten cost $20 and the one costs $2, leaving $480 against $498. The condition that changed in 2026 is the margin framework around frequent trading: FINRA Regulatory Notice 26-10, published 20 April 2026, replaces the day-trading margin provisions of FINRA Rule 4210, including the pattern day trader designation and its $25,000 minimum equity requirement.
Holding period sets the work, not the label
There is no day count that separates a trade from an investment. What differs is the evidence each holding period needs and how often the account transacts. Investor.gov's index funds page draws the same line inside fund management: index funds have generally followed a passive style, aiming to maximize returns over the long run by not buying and selling securities very often, while an actively managed fund seeks to outperform a market by doing more frequent purchases and sales.
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| Dimension | Long holding period | Short holding period |
|---|---|---|
| Question being answered | What is this business worth over years | What price is available to execute now |
| Evidence | Annual and quarterly filings on EDGAR | Quote, size, spread and order conditions |
| Transactions per result | Few | Many |
| Dominant cost | Ongoing annual expenses | Per-transaction costs and the spread |
| Record that settles a dispute | Cost basis and distribution history | Fill prices, times and order instructions |
Example: $500 gross, one round trip against ten
Example with illustrative amounts, because a personal record carries no public figure. Both records use an explicit $1 fee on every transaction and exclude taxes, financing and account fees.
- One round trip: 20 shares bought at $40.00 for $800 and sold at $65.00 for $1,300. Gross result $500, two transactions, $2 in fees, $498 net.
- Ten round trips: each one produces a $50 gross result, totaling $500 across twenty transactions, $20 in fees, $480 net.
The gross figures are identical by construction, so the two records isolate one variable: transaction count. The $18 difference is 3.6 percent of the $500 gross. Spread costs are already inside real fill prices and are not deducted a second time here.
The $25,000 pattern day trader test is being replaced
FINRA Regulatory Notice 26-10 amends FINRA Rule 4210 with new intraday margin standards that replace the day trading margin requirements in their entirety, including the day trade count used to designate a pattern day trader and the $25,000 minimum equity requirement. The effective date is 4 June 2026, and members needing more time are permitted to phase in implementation over 18 months, until 20 October 2027. During the phase-in the applicable requirement is whichever framework a specific firm has already implemented.
Both frameworks are live until 20 October 2027
FINRA's investor page on the new intraday margin requirements states the replacement in account terms: there is no $25,000 minimum equity requirement for day trading, and equity of at least 25 percent of the current market value of the long margin-eligible equity securities in the account must be held throughout the entire trading day rather than only at its end. The $2,000 minimum equity requirement still applies to leveraged trading. Finding out which framework a given broker is running is the subject of US day-trading margin rules are in transition.
A 1 percent annual fee is $28,000 over 20 years
FINRA's fees and commissions page groups costs into transaction costs such as commissions, markups and spreads, advisory fees charged whether or not anything trades, and ongoing expenses such as annual operating expenses. Its worked figure sizes the third group: a fee of 1 percent per year for 20 years on a $100,000 investment earning 4 percent is $28,000.
That is the mirror of the turnover arithmetic above. A high-transaction record is priced mainly by the per-transaction column, a low-transaction record mainly by the annual expense column, and both columns sit on a broker's published schedule, read category by category in how to read a brokerage fee schedule, next to the quote fields described in what a stock quote tells you. Zero commission removes one line, not the schedule.
Source references
Primary sources used for this guide. Follow the links for the original scope, definitions and conditions.
- Regulatory Notice 26-10 | FINRA.orgAccessed 2026-09-17
- Index Funds | Investor.govAccessed 2026-09-17
- Understanding the New Intraday Margin Requirements | FINRA.orgAccessed 2026-09-17
- Fees and Commissions | FINRA.orgAccessed 2026-09-17