"We made a great prediction that didn't pan out because others also acted on the same prediction" or "the future just didn't turn out like the past in that part

"We made a great prediction that didn't pan out because others also acted on the same prediction" or "the future just didn't turn out like the past in that particular data-mined aspect and we don't know why"? I know which story I'd want to tell were it my unprofitable system.