SQL avg, max, min of first 10 rows

 FWIW, I'm on a 600 running v5r2. I'm still pretty new to SQL; please, be
gentle.
 I'm trying to find the max and min of 10 records once I've positioned to
program to a certain date in the table. I've been trying this using STRSQL
before putting code into a program. Using the following code I can get the
correct 10 records to display:
 SELECT SYMBOL,DATE,CLOSE
FROM TESTTABLE
WHERE SYMBOL='DELL ' AND DATE = '2005-03-18'
ORDER BY SYMBOL,DATE DESC
FETCH FIRST 10 ROWS ONLY
 Then I tried this to get maximum and minimum:
 SELECT MAX(CLOSE), MIN(CLOSE)
FROM TESTTABLE
WHERE SYMBOL = 'DELL ' AND DATE = '2005-03-18'
ORDER BY SYMBOL, DATE DESC
FETCH FIRST 10 ROWS ONLY
 I get a message saying "Column DATE or expression in select list is not
valid". Do I need to do something like run the first SQL statement to get
those records then run another SQL statement against those records, like a
nested statement? TIA.
  Jim