Here are the actionable trade ideas extracted from the tweets:

IDEA [3] TICKER: AENA.MC DIRECTION: Short THESIS: Airlines objecting to Aena's fee hike plan could lead to reduced revenue or profitability for the Spanish airport operator if the hikes are blocked or scaled back. SPEAKER: @ReutersBiz TIMEFRAME: Medium-term

IDEA [6] TICKER: CA.PA DIRECTION: Short THESIS: Carrefour reported weaker-than-expected sales in its home market, causing shares to fall, indicating potential ongoing fundamental weakness. SPEAKER: @business TIMEFRAME: Short-term

IDEA [11] TICKER: ARLA_B.CO DIRECTION: Short