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 Responsys (NASDAQ: MKTG) tanked hard today, down by 34% at the low, after the company reported  earnings and worse-than-expected guidance.

So what: Third-quarter revenue added up to $40.5 million, resulting in non-GAAP net income of $3 million, or $0.06 per share. Subscription revenue was $28.5 million, a 19.4% increase. Those were mostly in line with market expectations, but the company's guidance disappointed investors.

Now what: Fiscal 2012 revenue should be in the range of $160 million to $161 million, with non-GAAP earnings per share of approximately $0.20 per share. Responsys should recognize $2.7 million in intangible amortization and incur $6.5 million in stock-based compensation, totals that are excluded from the non-GAAP figure. Next quarter should see sales between $42 million and $43 million.

Interested in more info on Responsys? Add it to your watchlist by clicking here.