Shares of Sun TV Network fell as much as 9.5% to an intraday low of Rs 547.55 on the BSE on Monday, as early counting trends indicated that actor-turned-politician C Joseph Vijay’s Tamilaga Vettri Kazhagam (TVK) could deliver a major upset to the long-standing dominance of the Dravida Munnetra Kazhagam (DMK) and the All India Anna Dravida Munnetra Kazhagam (AIADMK) in Tamil Nadu's electoral politics.