The Dow Industrials were hit especially hard on Friday. A lot of that was due to big tumbles in two of its cyclical stocks – Caterpillar and 3M. Chart 3 shows Caterpillar falling 6% (on higher volume) to undercut its 50-day average. CAT appears headed for a retest of its 200-day line. Chart 4 shows 3M tumbling 7% on huge volume. Both relative strength lines are in downtrends. The fact that both stocks are considered be cyclical in nature (or economically-sensitive) suggests that the market is getting more worried about the U.S. economy. That view is supported by the fact that Dow stocks holding up the best were in the defensive consumer staple and healthcare categories.