The S&P 500 fared a little better. The index dropped back below 1400, losing 0.5% in just its second negative week of 2012, but it's still up 11.1% since the calendar turned. The bulletproof Nasdaq Composite bucked the trend, rising 0.4% for the week, putting it up 17.8% in 2012. The coming week could see some positive momentum from window-dressing as portfolio managers have been known to buy up winners at quarter's end, but if TrimTabs is right, the market may need retail investors, who continued to pull money out of mutual funds investing in U.S. equities this week, to get into the act. Meantime, one strategy that's been foolproof in 2012 has been buying Apple ( AAPL), which had a minor disappointment last week as it proved unable to hold $600 but still finished the week up 1.8%, leaving the stock up 47% year to date. Oppenheimer took on the daunting task of trying to build out a bear case for Apple on Friday, and its conclusion will likely assuage those concerned the stock has come too far, too fast. "Our analysis suggests a compelling risk-reward outlook with a ~$900 (50% upside) bull case upside while a bear case leads to a ~$420 level (30% downside)," the firm said. "Considering that our bear case assumes almost a complete halt to Apple's growth in FY13/14, a scenario likely only in a severe economic downturn, we believe the risk/reward is very compelling." Oppenheimer, which has an outperform rating and a $700 price target on Apple, sees the continued success of the iPhone as the "key swing factor" in its thesis, and said it sees "opportunities to expand carrier/customer reach and move further into the mid-tier as key drivers." Check out TheStreet's quote page for Apple for year-to-date share performance, analyst ratings, earnings estimates and much more. As for Monday's scheduled news, there's very little to look forward to, with the biggest earnings names being Calmaine Foods ( CALM) and Apollo Group ( APOL). Pending home sales for February is the only piece of economic data on the docket, scheduled for 10 a.m. EDT. -- Written by Michael Baron in New York. >To contact the writer of this article, click here: Michael Baron.