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: Dell ( NAS: DELL ) dropped 11% in intraday trading today after reporting revenue fell short of expectations in its most recent quarter and lowering its revenue forecast for the fiscal year. So what: Non-GAAP EPS of $0.54 rose 69% year over year and beat the $0.49 consensus estimate. GAAP EPS of $0.48 rose 71% from the year-earlier quarter. Revenue of $15.7 billion grew a modest 1% year over year. Now what: Management said demand is "more uncertain" because of the economy. For the fiscal year, management lowered its revenue from growth of 5% to 9% to growth of 1% to 5%. Despite the lower revenue expectations, it guided non-GAAP operating income for the fiscal year up, from growth of 12% to 18% to growth of 17% to 23%.