Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Nalco Holding (NYSE: NLC) surged 25% today after cleaning chemicals specialist Ecolab (NYSE: ECL) said it would buy the water-treatment technologist for $5.4 billion.  

So what: For each share owned, Nalco shareholders will receive $38.80 in cash or 0.7005 of an Ecolab common share, representing a 34% premium to Nalco's closing price yesterday. Ecolab is making the move to diversify its health care and hospitality-heavy customer base, but given its 8% share price drop today, Wall Street is obviously skeptical of the strategy.

Now what: I'd take Mr. Market's cue on this one and stay away from Ecolab right now. The company is essentially paying about $1.6 billion in cash and issuing about 70 million shares to plunge into a space that has represented a very small part of its success to date. While Ecolab management has identified roughly $150 million in cost savings from the deal, the possibility of "diworsification" is too high to really get excited about it.

Interested in more info on Nalco? Add it to your watchlist.
Interested in more info on Ecolab?
Add it to your watchlist.