US corporates continue to do well. In 1Q18, they are likely to post sales growth of 9% and a new high in margins. Those profits are being reinvested for future growth.
Investors are worried about rising interest rates. They shouldn't be. Especially from current (low) levels, rising rates have coincided with rising equity prices. That has been the case as far back as the 1940s. The FOMC is very likely to raise rates again in June; since 1980, equities have peaked after the final rate hike.
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After rising two weeks in a row, US equities fell gain this week. April ends on Monday and barring a massive drop, the month will close higher for the first time since January (from Alphatrends.net). Enlarge any chart by clicking on it.