Enter a ticker symbol for fails to deliver information:

ACI WORLDWIDE INC -- ACIW
Fails to Deliver

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

Date	Price	Fails to Deliver
2023-05-10	23.95	3364
2023-05-09	24.36	5633
2023-05-08	24.34	3424
2023-05-04	24.62	587
2023-05-02	25.33	650
2023-04-28	24.70	297
2023-04-26	24.19	1329
2023-04-25	24.83	1102
2023-04-24	25.61	549
2023-04-21	25.64	379
2023-04-20	25.86	1219
2023-04-17	26.09	1248
2023-04-13	25.64	1225
2023-04-10	26.06	1019
2023-04-04	26.53	28
2023-03-31	26.32	8
2023-03-30	26.24	453
2023-03-29	25.93	860
2023-03-28	26.26	413
2023-03-22	26.20	5
2023-03-21	26.15	100
2023-03-20	26.94	209
2023-03-15	23.48	1

... 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.