Now that Telefonica’s bitter fight with one-time partner Portugal Telecom over Brazilian wireless network Vivo is over, the clear winner is . . . Telesp.
Since July 29, when Telefonica (TEF, quote) won the right to pay $9.7 billion to add Vivo (VIV, quote) to its empire, Telesp (TSP, quote) — normally considered TEF’s somewhat boring fixed-line subsidiary — shares are up 10%.

The reason? Expectation that TEF will follow through on promises to merge VIV into TSP to create a single strong full-spectrum telecom company.
But more than that, TSP is benefiting from old-fashioned fundamental improvement. The company is finally adding to its subscriber rolls again after four agonizing years of no growth at all.
And as banks like Barclays have started to point out, broadband subscriptions are at an all-time high.
Broadband, wireless and even the conventional wireline business: TSP seems to be a Brazilian telecom ticker to watch.
And as for the losers of the VIV fight, one peripheral name stands out. Tele Norte (TNE, quote), better known as “Oi” in Brazil, is down 3% since the deal, even though spurned VIV co-owner Portugal Telecom (PT, quote) turned around and bought a $4.8 billion stake in the company.

In the strategic war for Brazilian phone subscribers, TEF may have proven that an active general is better than a somewhat silent overseas partner. Clearly, TSP shareholders agree.