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 end-to-end electronics manufacturing leader Sanmina-SCI (Nasdaq: SANM) are soaring today, gaining more than 15% in steady, heavy trading.

So what: There are multiple drivers behind this move: Intel (Nasdaq: INTC) reported a plan to double its infrastructure spending to $9 billion in 2011 with potential trickle-down benefits for Sanmina, Raymond James upgraded the stock from sell to hold last night, and rival TTM Technologies (Nasdaq: TTMI) reported a blowout quarter earlier this week. Sanmina's share price has been rising all week long, ending it with a bang.

Now what: Even after this week's massive gains, Sanmina's stock looks cheap relative to its peers and rivals. It trades for just 10 times trailing earnings while TTM fetches a multiple of 31 and Jabil Circuit (NYSE: JBL) sells for 19 times earnings. This is a fine stock to watch for all you value hounds out there.

Interested in more info on Sanmina-SCI? Add it to your watchlist.