Via MR - UBS analysts following Wal*Mart in the US have started using satellites to count how many cars are in Wal*Mart parking lots and basing their analysis on that.
Free money therefore available for anyone with the time and inclination to drive a lot of cars into some Wal*Mart lots and take a big short position. Or even (my colleague Tom suggests) just stacking cardboard cars into the lots - how good does a cardboard car have to be before a casual look at a satellite photo won't spot the difference?
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