RegSho 2005 Sparks Heightened Scrutiny of Short Selling Practices

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RegSho 2005 Sparks Heightened Scrutiny of Short Selling Practices

//stocks-investing.news-articles.net/content/202 .. ghtened-scrutiny-of-short-selling-practices.html

Published in Stocks and Investing on Wednesday, August 13th 2025 at 10:15 GMT by WOPRAI

In the past 20 years (since 2005 with the introduction of RegSho), short selling has come under scrutiny as millions of retail investors have discovered what we have been highlighting since early 2005. Market makers abuse the “market maker’s exemption” and short excessive amounts of shares in your stock without locating, borrowing, paying the rebate or the interest rate to borrow. They are required to cover on the same trading day, and our data proves they do not.

The chart below shows “Daily Short Volume” in Masimo Corporation (MASI), and includes both EXEMPT (market makers) and NON-EXEMPT (everyone else) short sales. We consolidate the tape of all 14 US stock exchanges and purchase the “sell short” trade identifier data directly from the exchanges on a daily basis. This complete view of the trading in your stock shows a vastly different picture than “Total Short Interest”, which only includes non-exempt short sales that have not been covered by the twice per month reporting date. Unfortunately, this misses the majority of the short selling.

This indicates that a Short Squeeze may be starting in shares of Masimo Corporation at $153.43, after crossing above the $153.409 Trigger Price. This could signal a buying opportunity, given the right market conditions.

You can find the full report at [ https://www.woprai.com/ ]

Please find the applicable data below, drawn from all major market providers.

Date	Short Volume	Total Volume	Percentage	Squeeze Trigger	$ Value
2025-08-12	372,292	650,939	57.19	150.3	55,955,488
2025-08-11	486,931	871,171	55.89	147.37	71,759,021
2025-08-08	561,450	903,348	62.15	145.42	81,646,059
2025-08-07	506,773	888,284	57.05	146.01	73,993,926
2025-08-06	2,050,580	3,724,329	55.06	142.84	292,904,847
2025-08-05	518,946	1,121,396	46.28	162.56	84,359,862
2025-08-04	289,556	962,007	30.1	160.46	46,462,156
2025-08-01	155,158	476,023	32.59	154.05	23,902,090
2025-07-31	189,500	633,326	29.92	155.82	29,527,890
2025-07-30	269,953	861,588	31.33	158.65	42,828,043
2025-07-29	191,004	487,972	39.14	159.94	30,549,180
2025-07-28	183,498	549,021	33.42	162.8	29,873,474
2025-07-25	260,439	561,628	46.37	164.1	42,738,040
2025-07-24	213,644	454,270	47.03	163.32	34,892,338
2025-07-23	300,365	631,380	47.57	164.32	49,355,977
2025-07-22	190,846	571,836	33.37	157.53	30,063,970
2025-07-21	183,411	411,619	44.56	154.92	28,414,032
2025-07-18	257,597	509,163	50.59	155.22	39,984,206
2025-07-17	214,107	491,420	43.57	158.42	33,918,831
2025-07-16	201,791	418,368	48.23	159.44	32,173,557
2025-07-15	175,954	461,184	38.15	160.23	28,193,109
2025-07-14	253,631	556,034	45.61	161.95	41,075,540
2025-07-11	224,076	452,222	49.55	162.64	36,443,721
2025-07-10	118,648	356,274	33.3	166.87	19,798,792
2025-07-09	146,947	389,053	37.77	164.65	24,194,824
2025-07-08	361,290	868,113	41.62	162.59	58,742,141
2025-07-07	313,868	832,075	37.72	164.23	51,546,542
2025-07-03	236,464	498,668	47.42	167.49	39,605,355
2025-07-02	215,398	431,836	49.88	171	36,833,058
2025-07-01	213,077	539,421	39.5	169.3	36,073,936
2025-06-30	147,775	394,424	37.47	168.17	24,851,322
2025-06-27	492,885	1,028,725	47.91	167.92	82,765,249
2025-06-26	368,645	590,101	62.47	167.06	61,585,834
2025-06-25	244,204	561,795	43.47	169.86	41,480,491
2025-06-24	355,614	856,773	41.51	169.23	60,180,557
2025-06-23	199,063	392,936	50.66	166.93	33,229,587
2025-06-20	313,688	629,000	49.87	165.32	51,858,900

Total	281,475,599	733,368,947	38.38	153.38	43,171,996,232

* Totals include all data records back to 2020-08-14 00:00:00, data set is truncated for viewing.