RegSho Era Uncovers Market Maker Abuse in Short Selling Since 2005

Published in Stocks and Investing on Wednesday, August 13th 2025 at 10:30 GMT by WOPRAI
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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 QuinStreet, Inc. (QNST), 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 QuinStreet, Inc. at $15.29, after crossing above the $15.167 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	222,059	919,143	24.16	14.65	3,253,164
2025-08-11	364,636	1,018,638	35.8	14.6	5,323,686
2025-08-08	244,710	896,549	27.29	15.47	3,785,664
2025-08-07	122,278	534,981	22.86	16.21	1,982,126
2025-08-06	282,208	617,556	45.7	16.74	4,724,162
2025-08-05	207,177	734,637	28.2	16.45	3,408,062
2025-08-04	156,401	471,812	33.15	16.99	2,657,253
2025-08-01	157,207	526,975	29.83	16.16	2,540,465
2025-07-31	108,065	465,350	23.22	16.37	1,769,024
2025-07-30	112,496	355,918	31.61	16.26	1,829,185
2025-07-29	80,990	348,552	23.24	16.24	1,315,278
2025-07-28	81,778	409,624	19.96	16.63	1,359,968
2025-07-25	88,758	372,539	23.83	16.68	1,480,483
2025-07-24	126,637	713,348	17.75	16.55	2,095,842
2025-07-23	71,616	577,348	12.4	16.2	1,160,179
2025-07-22	107,073	556,795	19.23	15.85	1,697,107
2025-07-21	130,110	556,996	23.36	15.35	1,997,189
2025-07-18	146,087	638,864	22.87	15.23	2,224,905
2025-07-17	94,770	408,710	23.19	15.6	1,478,412
2025-07-16	98,372	461,094	21.33	15.61	1,535,587
2025-07-15	102,514	536,455	19.11	15.57	1,596,143
2025-07-14	86,415	701,844	12.31	15.51	1,340,297
2025-07-11	79,535	460,696	17.26	15.45	1,228,816
2025-07-10	95,834	610,559	15.7	15.66	1,500,760
2025-07-09	222,765	762,070	29.23	16.26	3,622,159
2025-07-08	60,276	329,802	18.28	16.19	975,868
2025-07-07	75,803	391,600	19.36	16.1	1,220,428
2025-07-03	56,837	248,243	22.9	16.53	939,516
2025-07-02	85,671	412,990	20.74	16.32	1,398,151
2025-07-01	197,530	664,748	29.72	16.4	3,239,492
2025-06-30	149,537	466,322	32.07	16.07	2,403,060
2025-06-27	179,272	577,361	31.05	15.71	2,816,363
2025-06-26	81,630	357,204	22.85	15.5	1,265,265
2025-06-25	104,270	363,715	28.67	15.61	1,627,655
2025-06-24	96,991	386,723	25.08	15.78	1,530,518
2025-06-23	84,314	345,106	24.43	15.39	1,297,592
2025-06-20	289,879	923,321	31.4	15.25	4,420,655

Total	170,667,069	480,120,126	35.55	15.17	2,588,567,714

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