A.C. Pharmaceutical announced FDA approval for a new drug on October 12. XY Drug Co. announced approval for its new drug on October 14. No other information was released that would affect returns over the period. What is the combined cumulative abnormal return for the five-day period commencing two days prior to the approval announcement date? Use the following data to answer this question. No trading occurred on October 15 and 16.

Date	Market	AC Return	XY Return
10-Oct	.20%	.10%	.00%
11-Oct	.10%	.20%	.10%
12-Oct	.00%	.60%	.30%
13-Oct	.10%	.40%	.20%
14-Oct	.20%	.50%	.30%
17-Oct	.10%	.30%	.10%
18-Oct	.10%	.10%	.40%