This video seems to be the source of the claim but I can't find what statistics they use to back it up.
These figures are duplicated at She-Conomy:
Women account for 85% of all consumer purchases including everything from autos to health care:
- 91% of New Homes
- 66% PCs
- 92% Vacations
- 80% Healthcare
- 65% New Cars
- 89% Bank Accounts
- 93% Food
- 93% OTC Pharmaceuticals
Is there some legitimate study that shows this conclusion?