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 chip equipment maker ASML ( NAS: ASML ) popped as much as 10% today after its third-quarter results and current-quarter guidance topped Wall Street expectations. So what: The shaky economy has fueled a lot of worry over the semiconductor sector, but ASML's announcement -- 32% quarterly profit growth and a full-year revenue forecast of $7.5 billion -- reassures investors that orders are still at least rising. The company's order book can sometimes serve as a bellwether for big chip makers, so it's no surprise that two of its major customers, Intel ( NAS: INTC ) and Taiwan Semiconductor ( NYS: TSM ), are also up a bit today. Now what: I wouldn't be too quick to jump into the stock just yet.