Teradata (TDC) made a rare appearance in the top spot for unusual call and put volume for IBD 50 constituents Friday with more than 6,500 contracts trading compared to its daily average of about 600. Shares gapped and trended lower to finish the day off nearly 10.50% in sympathy with a warning from enterprise data peer Informatica (INFA), which tumbled about 28% after reducing its Q2 top and bottom-line outlook. Of today's option volume, puts