MUMBAI, March 17 -- Shares of induction cooktop makers jumped after a blockade of the Strait of Hormuz amid the West Asia conflict disrupted liquefied petroleum gas (LPG), or cooking gas, supplies, pushing households towards electric alternatives. But the surge may do little to move the needle for the companies behind these appliances.

Since 28 February when the US and Israel struck Iran, shares of TTK Prestige and Butterfly rose about 15% through 12 March, while Stovekraft climbed 9% through 11 March, compared with a 6% fall in the benchmark Nifty 50.

For listed consumer appliance companies such as TTK Prestige, Stovekraft Ltd, and Butterfly Gandhimathi Appliances Ltd, induction cooktops account for a small share of revenue, limiting t...