Yahoo! shares are down meaningfully during the last two trading days due to the decline in BABA shares, even though Yahoo! announced this week the best-case scenario for its shareholders in the form of a tax-free spin-off of its entire equity position in BABA (see our note here). The trading has created an unusual dislocation, in our opinion. Assuming 1) that the BABA stake trades at a 10% discount to BABA as a SpinCo (and, therefore, is worth $33/YHOO share at current BABA levels), and 2) that its 35% equity stake in Yahoo! Japan is valued using a 44% discount to the current market value (i.e., a 38% tax rate plus a 10% liquidity value), then the core Yahoo! business is currently valued at nearly a negative enterprise value of $1bn.