* Nikkei 225 Stock Average: +7.94 (+0.0%) to 18,146.30, rally extended to a third day * Nikkei 225 futures Osaka: +30 (+0.2%) to 18,190, Singapore (SGX) 18,175, Chicago (CME) 6/29 — 18,180 * TOPIX: +5.48 (+0.3%) to 1,780.36; Advancers 894 x decliners 693 (unchanged 144); New highs 101 x new lows 16; 17/33 sectors posted [...]