Small Investors, Once Burned, Lead New Bull
Individual investors lead charge back into stock market, with Standard & Poor's 500-stock index rising 13 percent and Nasdaq composite up 23 percent; three years of stock market torment seem not to have shaken long-held view that stocks are best for long haul; some Wall Street veterans say market's recent action has familiar and troubling feel that harks back to heady days of 1999; wonder whether investors, in their zeal to recover some losses in their portfolios, are too willing to forgive and forget lessons of torturous bear market; in most recent week, investors put $3.3 billion into domestic stock mutual funds; it was 14th consecutive week that more money flowed into than out of stock funds; with so much bullishness about, companies are finding it easier to raise money in stock market; graph (M)
