Volatility continues to increase in the stock market and many of the leaders are breaking down. In particular, semiconductors took a rather big hit when one of the bellwethers warned of weakening global demand. Nevertheless, despite the significant headwinds, I do not think this spells the end of the bull market. But the technical damage to the charts is severe, particularly to the small caps, which are in full-blown correction mode. The large caps must show leadership and rally immediately -- or it will put at risk the critical and widely-anticipated year-end rally.

This seasonally weak time of the year has proven reliable once again. As I observed last week, the volatility index often hits a peak in October but has never hit a trough during this notorious month. Last week, I warned of more downside in stocks before any new highs are challenged. It was the type of week that tests investors’ bullish conviction, and it was way overdue.

Yes, the market showed significant weakness last week for the first time in quite a while. In fact, the Dow Jones Industrial Average moved triple digits each day. But it was all quite predictable, as I suggested in last week's article, and certainly nothing to worry about. Now the market appears to be poised for a modest technical rebound, and longer term, U.S. equities should be in good shape for a year-end rally. However, I still believe more downside is in order before any new highs are challenged.

Stocks ended last week on a high note, closing a smidge above strong resistance at 1900 for the S&P 500, which set a new closing high for the large-cap index, albeit on low pre-holiday volume. With the Memorial Day holiday giving us a short week of trading, all eyes are on voting in Ukraine, where a decisive win for billionaire business tycoon Petro Poroshenko seems assured.