Trades for January 9 and 10, 2014

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Odd Lot Rates in a Post-Transparency World


In the equities market, odd lot trades are generally defined to be trade executions of less than 100 shares.[1] Prior to December 9, 2020, odd lot trades were not reported to any of the consolidated public tapes, and were therefore not readily visible to the public. However, such trade executions are typically reported on the publicly-available proprietary (direct) feeds offered by most exchanges that are purchased primarily by sophisticated market participants.[2]

Utilizing data from these proprietary feeds we previously reported that in nine months ending June 30, 2020, the daily odd lot rate for corporate stocks ranged from approximately 18% to 24% of trades, and the daily odd lot rate for exchange-traded products ranged from 11% to 12% of trades. The data also revealed that higher-priced stocks tended to have higher odd lot trade rates, with the top price decile averaging over 30%.[3] A recent update of these data through the end of September 30, 2020, show average odd lot rates for each price decile to be consistent with observed levels from prior quarters.[4]

Though odd lot trades, especially in high-priced stocks, may be the result of small retail orders, various industry participants and academics have put forth alternative hypotheses to explain the presence of high odd lot rates, including the purposeful splitting of round-lot orders into odd lot sizes to avoid reporting trades to the public tape.[5]

Recent changes in the reporting requirements of odd lot trades provide us with an opportunity to begin to explore this hypothesis. Beginning December 9, 2020, odd lot transactions in all NMS stocks are now reported to the public tape.[6] By comparing odd lot rates for the periods before and after the reporting requirement went into effect, we can observe the extent to which this additional transparency may have impacted odd lot trade rates. For both time periods our analysis employs the same methodologies and data feeds used to produce the odd lot rate metrics described above.[7] As a result, our analysis of odd lot rates only reflects on-exchange trading, because off-exchange odd lot trades were not observable prior to December 9, 2020.[8]

What the Results Show

Figure 1 presents a full 18-month history of daily odd lot rates for corporate stocks and ETPs from the beginning of June 2020 through the end of December 2020.[9] Figure 2 focuses on the week before and the three weeks after odd lots began to be reported to the public tape.

Figure 1: Odd Lot Rate for US Corporate Stocks and ETPs, July 2020 to December 2020

Figure 2: Odd Lot Rate for US Corporate Stocks and ETPs, December 2020

For corporate stocks the charts show no visible decline in the pooled daily odd lot rate immediately after the first week of December 2020 when the new reporting regime came into effect. In contrast to the US corporate stock odd lot rate behavior, there is a small visible decline in the pooled daily odd lot rates for ETPs during the second week of December. However, the decline does not begin until two days after the switch to odd lot reporting to the tape. In fact, odd lot rates are highest on December 9, the first day of the new reporting regime.

Figures 3 and 4 show no visible decline in pooled daily odd lot rates across four particular US stock price deciles in December 2020. However, the odd lot rate for low price (decile 1) stocks ranges from 7.2% to 12.6%, which is much lower than the 15% or greater range previously observed in Q2 through Q3 of 2020. As shown in the 18-month chart, this decline occurred suddenly on October 25, 2020, and may be unrelated to the December 9, 2020 change in odd lot reporting requirements.[10]

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Figure 3: Odd Lot Rate by Price Decile for US Corporate Stocks, July 2020 to December 2020

Figure 4: Odd Lot Rate by Price Decile for US Corporate Stocks, December 2020

Figures 5 and 6 show the variation in pooled daily odd lot rates across ETP price quartiles. The decline in odd lot rates on the Wednesday following the switch in reporting is apparent in all four price quartiles. By the end of December, odd lot rates are as high as they were during the first week of December.

Figure 5: Odd Lot Rate by Price Quartile for US ETPs, July 2020 to December 2020

Figure 6: Odd Lot Rate by Price Quartile for US ETPs, December 2020


Overall, this preliminary exploration reveals no evidence of a decline in odd lot rates for US corporate stocks after the switch to reporting odd lot trades to the tape. This suggests that the prior lack of transparency of odd lot trades on the public tape may not have been one of the drivers of odd lot trading. However, we do note that odd lot rates for the lowest priced stocks experience a sharp decline on October 25, 2020, and continue at a lower level through the end of December. Though the initial decline occurs before the reporting regime switch, our data is not determinative, in and of itself, of whether this decline in odd lot rates for low priced stocks might have been in anticipation of the December 9, 2020 reporting requirements.

For ETPs, though odd lot rates do appear to decline during the first week of the new reporting regime, they did not begin to decline until two days after the switch and appear to have returned to early-December levels by the end of the month.

Additional analyses will follow as the sample of post-odd lot reporting days increases.

End Note

In any analyses of the size of reported trade executions it is important to recognize that execution sizes for on-exchange trades do not necessarily reflect the actual size of an incoming marketable order, nor the original size of any existing resting order. For example, a marketable odd lot order for 1 share may interact with a resting order for 100 shares. This results in a 1-share odd lot execution reported to the public tape as expected. However, in this instance a subsequent marketable order for a full 100 shares would first lift the remaining 99 shares from the existing resting order and then lift 1 share for the next resting order in the queue. As such, the execution of this original round lot would be reported as one odd lot trade of 99 shares, and one odd lot trade for 1 share. Though the second and third executions are of odd lot size, the marketable and resting orders that generated those executions were not. Different combinations of marketable order sizes and resting order sizes can yield similar results.

[1] This 100-share definition includes all but three equities: BRK.A, BH, and SEB.

[2] These individual exchange feeds are typically used by only the most sophisticated of market participants such as market makers and high-frequency traders. Most institutional investors, retail investors, and academics, generally do not consume this data.

[5] See, for example, the Commission’s 2020 Concept Release on Equity Market Structure. See also the End Note for a description of an alternative source of odd lot trades.

[6] See orders approving amendments to the UTP Plan (Release No. 34-70793) and CTA Plan (Release No. 34-70794) , October 31, 2020.

[8] At present, data is sufficiently detailed for 12 of 13 equity exchange feeds to compute this metric. For each of these exchanges we only include trades that are executed during the continuous market (i.e. volume resulting from the opening and closing crosses are excluded).

[9] Complete stock-by-stock odd lot data for Q4 2020, as presented in the chart, will be added to the existing 15 months of odd lot data already published on the SEC’s market structure web site as part of the next scheduled quarterly data series update (expected mid-February).

[10] Decile 1 stock prices on October 25, 2020 range from to $0.15 to $2.67.

This analysis was prepared by the Staff of the U.S. Securities and Exchange Commission. The Commission has expressed no view regarding such analysis or any statement contained therein.

Data Downloads


Learn how the SEC constructs odd lot rates and other metrics.

Trading Suspensions

This page lists recent SEC trading suspensions. The federal securities laws allow the SEC to suspend trading in any stock for up to ten trading days when the SEC determines that a trading suspension is required in the public interest and for the protection of investors. You’ll find answers to many of your questions about trading suspensions ? including how they differ from trading halts ? in Fast Answers.

Apple’s Stock Split History

Adjusted for splits, Apple stock’s historical, millionaire-making return is mind-boggling. Here’s everything you need to know about the tech giant’s stock splits over the years.

This article was updated on Jan. 9, 2020, and originally published on Aug. 10, 2020.

It’s no secret that Apple (NASDAQ:AAPL) stock has outperformed the S&P 500 over the long haul. But the tech giant’s stock price today simply doesn’t do Apple stock’s outperformance over the years justice. After all, Apple has split its stock four times since it went public — and its last stock split was a 7-to-1 split.

In order to fully appreciate Apple stock’s long-term return, here’s a breakdown of Apple’s stock split history, as well as the stock’s split-adjusted return over the long haul.

Image source: Getty Images.

AAPL stock split history

Stock Split


Date shown is the first date shares traded on a split-adjusted basis.

Apple stock’s split-adjusted return

Going public at $22 in 1980 and trading at around $156 recently, Apple’s stock price today doesn’t come close to capturing the enormous return long-term shareholders have seen.

For some context, here’s a list of Apple stock’s split-adjusted returns for various periods.


Apple Stock
Split-Adjusted Return

Since Apple’s IPO in 1980

Data source: YCharts.

To put Apple stock’s monstrous split-adjusted return in perspective, consider this: If all dividends were reinvested, $10,000 invested just 10 years ago would be worth about $76,000 today. This same amount invested when Apple went public in 1980 would be worth about $4.1 million today.

AAPL stock split FAQ

How many times has Apple stock split?

Since Apple went public in 1980, shares have split four times.

When did Apple stock split last?

In June 2020, Apple stock was split 7-to-1. Whether it was on purpose or not, the split changed Apple stock’s pre-split all-time high from a few dollars above $700 to about $100 after accounting for the split.

What is Apple’s split-adjusted IPO price?

Apple’s initial public offering price was $22. Adjusted for splits, however, the IPO price is $0.39.

Why does Apple split its stock?

Generally, stock splits are purposed to make shares easier to buy for individual investors. This was particularly the case with Apple during its last split, as shares went from trading under $700 to under $100. In a 2020 earnings call, Apple CEO Tim Cook specifically said that the company was splitting its shares to make them more accessible to a larger group of investors.

In the end, however, splitting a stock does nothing for the overall value of a business.

Will Apple stock split again?

This really depends on how shares perform, but it’s unlikely to happen anytime soon. Given that when Apple split its shares last, it didn’t do it until the stock hit $700, a stock split is probably the last thing on the board’s mind with shares currently trading at about $175.

Apple’s need for so many stock splits over the years is a testament to its market-crushing return. Indeed, without these splits, Apple’s stock price would have appreciated so much that many individual investors would have a difficult time buying shares today.

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