6. Athersys ( ATHX) is developing therapeutics using stem-cell research, including MultiStem. Its second-quarter loss narrowed to $3.1 million, or 16 cents a share, from a loss of $3.4 million, or 18 cents, a year earlier. Revenue more than quadrupled to $1.9 million. Athersys has $12 million of cash and no debt. Its stock sells for a book value multiple of 3.8 and a sales multiple of 11, 28% and 89% discounts to peer averages. All four of the analysts evaluating Athersys advocate purchasing its shares. A median price target of $7.33 implies 160% of upside. Bullish Scenario: WBB Securities offers a target of $9, predicting the stock will more than triple.