Enter a ticker symbol for fails to deliver information:

AC IMMUNE SA -- ACIU
Fails to Deliver

Short Interest | Short Volume | Borrow Data | Fails to Deliver

Date	Price	Fails to Deliver
2023-05-12	2.11	636
2023-05-11	2.10	159
2023-05-09	2.11	126
2023-05-08	2.09	414
2023-05-03	1.88	102
2023-05-01	1.94	965
2023-04-14	2.29	2133
2023-04-13	2.19	207
2023-04-11	2.15	198
2023-04-04	2.27	48
2023-04-03	2.34	48
2023-03-31	2.38	965
2023-03-30	2.38	218
2023-03-28	2.23	900
2023-03-24	2.19	6
2023-03-16	2.24	200
2023-03-14	2.19	10

... naked short selling is economically equivalent to a zero-fee zero-rebate loan to the naked short seller from a participant that involuntarily fails to receive shares...
Naked Short Sales and Fails to Deliver: An Overview of Clearing and Settlement Procedures for Stock Trades in the US

Naked short selling is an important and under-reported phenomenon in the US capital markets. Keep track of the data for all of your stocks here.