BUZZ-St Modwen: Up on JP Morgan rating upgrade
** The real estate investment and services co's shares up as much as 4.4 pct at 466.1p after JP Morgan Cazenove raised its rating on the stock to "overweight"
** "In a lower for longer yield environment, we believe prime real estate with rental growth will be sought out," the brokerage's analysts said
** Stock among top gainers on the FTSE 250 and nearly 40 percent of daily avg trading volume gone through
** Brokerage also raised PT to 530p from 510p
** All 5 analysts that cover the stock have a buy or stronger rating, with a median target price of 530p (abhiram.nandakumar.thomsonreuters.com@reuters.net)