mumbai, July 25 -- Retail investors, including high-net-worth individuals, have suffered significant losses this week as the benchmark Nifty 50 slipped below the 24,000 level, which had served as a strong support for weeks. Having correctly anticipated the initial correction, they turned bullish again just as renewed tensions in West Asia sparked a broader sell-off, leaving their index call bets deep in the red. These investors, who tend to be net buyers of Nifty 50 and Nifty Bank call options and net sellers of puts, apart from being bullish on stocks, actually played a negative card for this Tuesday's weekly Nifty expiry. After remaining net long until last Thursday, retail investors turned net sellers of index calls on Friday and Monday,...