Nikkei down 0.45 pct but steel stocks gain

(Updates to midmorning)

TOKYO, Feb 20 (Reuters) - The Nikkei average fell 0.45 percent on Tuesday as investors took profits in a range of stocks including Nippon Oil Corp. after U.S. crude oil futures held onto the previous day's losses and as the market became cautious ahead of the Bank of Japan's policy meeting.

Shares of Nissan Diesel Motor Co. Ltd. were untraded in early trade due to a ...