Historically, when the S&P 500 has risen by double digits by the end of June, the entire year has never been negative and has increased by an average of 25.1%.
From July to December, there has been an average increase of 7.7% nearly 83% of the time.
Another interesting fact is that when there were 20 or more ATHs in the middle of the year, there was also an average of 15 more new ATHs in the second half, with an average final return of 9.6%.