Greens surprise Labour, but impact on gilts may be limited, as Netflix drops bid for WB

UK markets return to the spotlight on Friday following Labour’s surprise defeat in the Gorton and Denton by-election. Labour’s candidate finished third, while the Greens secured a commanding win over both Labour and Reform. Investors in gilts and sterling must now assess the longer-term implications of the result — including whether it signals growing traction for the radical left within UK politics — and what it could mean for Keir Starmer’s leadership.

Sterling initially strengthened earlier this morning but has since slipped to fresh lows, testing $1.3450. It is currently the weakest performer in the G10 on Friday and the second weakest over the week. Despite heightened political uncertainty, the decline in the pound has been relatively contained so far. Notably, gilts outperformed on Thursday, with yields falling sharply.

Why Starmer may remain secure — for now

Earlier this month, speculation that Starmer could face an internal challenge sparked some volatility in the gilt market. However, that uncertainty faded quickly after senior cabinet members publicly backed him. Although calls for his resignation may intensify within parts of the party, we do not expect Labour heavyweights or cabinet members to support such moves.

It seems unlikely that Starmer would be ousted on the back of this result alone. Few potential rivals would want to assume leadership ahead of next week’s Spring Statement. Moreover, possible successors such as Wes Streeting and Angela Rayner face their own challenges — Streeting could encounter a Green surge in his constituency, while Rayner continues to contend with questions surrounding the stamp duty issue. Cabinet members have already cautioned against overinterpreting the by-election outcome, suggesting Starmer’s position is stable for the time being.

Why a leftward shift may not help Labour

Some within Labour may argue for a sharper move to the left in response to this defeat. However, Gorton and Denton represents just one constituency and is not necessarily indicative of national sentiment. It is far from clear that adopting more left-leaning policies would strengthen Labour’s prospects in the May elections. According to recent YouGov data, the economy remains voters’ primary concern, and more progressive policies may do little to address rising unemployment, particularly among younger people.

Why gilt volatility may remain contained

Although the by-election presents a political test for the gilt market, it is unlikely to trigger significant volatility at week’s end. The broader impact of the May election results is likely to matter more. Additionally, there is speculation that next week’s Spring Statement could see the Office for Budget Responsibility reduce its forecast for gilt issuance this year, following strong tax receipts earlier in the year. That could help ease upward pressure on yields and offset any market reaction to Labour’s loss.

Technical focus: GBP/USD

Sterling is broadly weaker today, though the by-election result has not sparked a full-scale sell-off. GBP/USD is hovering around its 200-day simple moving average at $1.3447. A decisive break below this level would represent a significant technical deterioration and suggest downside momentum is building.

Netflix rallies after abandoning Warner Bros Discovery bid

European equity futures point to a firmer open on Friday, capping another week in which European indices are set to outperform US markets. Netflix is in focus after confirming it has withdrawn its bid for Warner Bros Discovery. The stock jumped 8% in post-market trading on Thursday and could recover much, if not all, of its roughly 10% year-to-date decline.

Investors will also monitor European inflation data, with attention on France to see whether CPI rebounds following a sharp drop earlier in the year.

Sources: Kathleen Brooks