Junk bonds have seen average 1995 total returns jump 16.3%. Sure, that pales beside equities' 35.5%. But junk is way up from the 0.2% gains in 1994, when Fed rate hikes hit. While 9 of the top 10 performers sell at a discount, their prices are much higher. USAir leads the pack: American or United, both stronger financially, may buy it. Improved news for wireless services and Atlantic City casinos cheer buyers.