david wilson, thank you and we bring in tracey holloway.pable sense of gloom about the u.s. economy descending upon the country? >> all of a sudden? it's been on the slow burner. we used to say when america coughs, the world catches a: now we can see that -- say that about china. talked about uncertainty over emerging markets feeding into that interest rate decision. it has been on the monitor and it seems to be intensifying. caliber -- caterpillar is a good example, it's a good way to take a temperature of the global economy. we are seeing those concerns start to manifest themselves in willumbers for it michael: interest rates keep from rising? the ceo of caterpillar but you have to wonder, it seems like all the news -- all the news is gloomy right now. >> it's not great and before we came on air, we were chatting about emerging-market currencies and it is ugly out there. michael: when you look at the brazilian real, it is dropping at the fastest record in years. and ditto momentum chart selling momentum is at its highest in three years an