Japan mulling $7.8 billion loan guarantee to JAL: source
Shares in JAL jumped 8 percent after the Nikkei business daily reported on Sunday the government's possible loan and investment guarantee.
As of 0015 GMT, JAL shares rose 8 yen to 108 yen, outperforming a 1.7 percent gain in the benchmark Nikkei average .
(Reporting by Yoshifumi Takemoto)