=INDEX(Data!$H$1:$H$1000,MATCH(MAX((TEXT(Data!A$1: A$1000,"dd
mmm")=TEXT(A8,"dd mmm"))*(Data!$B$1:$B1000)),((TEXT(Data!A$1:A$1000, "dd
mmm")=TEXT(A8,"dd mmm"))*(Data!$B$1:$B1000)),0),1)

Your formula, as posted/written returns the maximum value in Column B for
those rows matching the date. You would change the $B$1:$B$1000 to
$D$1:$D$1000 if you want to find the row based on the maximum value in
column D.

The value returned is from column H.

--
Regards,
Tom Ogilvy

"JAK" wrote in message
...
The array formula MAXIF correctly gives me the maximum
value of A in my table A1:h:99, say A43. How can I find
the corresponding value in column D, i.e. in this case D43?