Paced by Harvard University's staggering $34 billion stockpile, 76 colleges now boast endowments over $1 billion after robust returns on their investments over the past year, according to an annual study being released today. Harvard's endowment rose by nearly $6 billion over the past year, a nearly 20 percent increase. Yale University's endowment, the nation's second largest, rose to $22.5 billion, a 25 percent increase. Stanford University, Princeton University, and the University of Texas system rounded out the top five. Among colleges with endowments greater than $1 billion, the median one-year return was 21 percent. Nationally, the median return was...